Arc 4

The Everlasting Contract (永遠の契約, Eien no Keiyaku) is the fourth arc of the Re:Zero kara Hajimeru Isekai Seikatsu series, preceded by the Return to the Capital City Arc and followed by the Stars that Engrave History Arc. Arc 4 consists of six light novel volumes, a manga adaptation with art made by Atri Haruno and Yu Aikawa, and is currently the longest arc.

Overview
Subaru is broken by the loss of Rem and returns back to the Mansion with Emilia and Otto Suwen, only to find the master of the mansion and his servants absent. In their place, Subaru and Emilia are greeted by a new maid who introduces herself as Frederica Baumann and points them towards a mysterious place referred to as the Sanctuary. Upon Subaru, Emilia and Otto's arrival, they find themselves stuck in a forsaken village, located in the very depths of the Lost Forest of Kremaldy, where they find half of the Irlam Village, Ram and the master of the Sanctuary itself - Roswaal. However, a badly wounded Roswaal instructs the two of them to carry out the Trials of the Sanctuary, with the examiner of the Trials being the Witch of Greed, to liberate the Demi-Humans from the barrier. Unbeknownst to them, their journey starts to get complicated.

Protagonists

 * Natsuki Subaru
 * Emilia

Antagonists

 * Roswaal L Mathers
 * Elsa Granhiert
 * Meili Portroute
 * Pandora (flashback)
 * Regulus Corneas (flashback)

Adaptations

 * -|Light Novel=

Re:Zero Light Novel Volume 10

 * Prologue
 * A flash forward to Subaru's meeting with Echidna is added.


 * Chapter 1
 * Due to the changes in Arc 3 Subaru is unaware if Beatrice remembers Rem, so he does not ask about her, but instead just asks about her relationship to Roswaal, hoping to learn about his intentions.
 * Although she still chooses to withhold information, Beatrice is a bit more helpful by giving Subaru a lead by telling him to head to the Sanctuary to find the answers to his questions.
 * Emilia talks to Frederica while this is happening to learn more about the sanctuary itself.
 * The sanctuary and the forest surrounding it now have names, "Sanctuary of Kremaldy" and the "Lost Forest of Kremaldy" respectively.


 * Chapter 2
 * Subaru does not trick Otto into joining the camp and doesn't name him Internal Affairs Officer yet.
 * The Sanctuary's barrier gains additional lore due to some changes which now makes unauthorized entrants get lost to keep outsiders away from the settlement.
 * To circumvent this in the Light Novel, Frederica gives Emilia a Pyroxene mana crystal to let her in.
 * When entering the Sanctuary, the Pyroxene teleports Subaru near Echidna's grave where he meets a Ryuzu clone who seemingly guides him to the tomb. This leads to a few events being rearranged and the pacing is faster than in the Web Novel.
 * The exposition regarding Reid and Volcanica is removed, however, Echidna still states her soul is being held captive in the tomb. Although she mentions the existence of the other witches Echidna leaves out that their souls also reside in the tomb as well.
 * The meeting with Minerva, Typhon, and Sekhmet is entirely cut from here and instead moved to volume 11.
 * Because the above doesn’t happen, Subaru gets over his instinctual fear of Echidna instead due to the effect of her tea making the Sloth Witch Factors active. It also mentions that Factors allowed him some resistance to the miasma which is why he could enter the first time.
 * Subaru's reasoning for not asking Echidna about how to cure Rem's condition is directly clarified instead of needing to be inferred.
 * Subaru realizes that Garfiel and Frederica are related much faster.


 * Chapter 3
 * Suspicions are raised from everyone in the group towards Frederica after a discussion on the strange teleportation crystal given.
 * Roswaal notes that you don’t need the crystal to pass through the barrier.
 * In the Light Novel, Subaru meets Ryuzu Burma as the first Ryuzu Meyer copy.
 * Ryuzu reveals to Ram to be an elf, making her actually a half-elf. This fact was not known in the WN.
 * The anti-liberation faction is mentioned earlier, and Frederica is suspected by Ram to be working with them if not a member herself.
 * Emilia takes the lead in the 2nd half of the discussions with the Irlam villagers regarding their fates, improving their relationship with her for the first time.


 * Chapter 4
 * Because the POV does not leave Subaru, the Witch of Envy's appearance in his trial is not seen as result.
 * Chapter 5
 * Otto is not present during the meeting since logically he's still considered an outsider.
 * Roswaal suspiciously mentions invoking a contract offhandedly before Subaru leaves the discussion in anger.
 * Subaru hides the fact that he has the qualification to take the trials.
 * Garfiel makes his proposal to Subaru on the ride back to Irlam Village instead of the dawn of 3rd day, suggesting that he would agree to let the villagers go. He planned to talk to Subaru about taking the trial instead of Emilia.
 * Garfiel gives Subaru his pyroxene.

Re:Zero Light Novel Volume 11

 * Chapter 1
 * In the 2nd loop, this time Subaru decides to reveal he has the qualifications to take the trials. The scene proceeds much or less the same as the WN e.g Garfiel being against Subaru taking the trial only with Otto being present this time.
 * After the discussion is over before he meets with Roswaal later, Subaru strikes up a conversation with Garfiel and Ryuzu outside her house and to learn the reason they are against him taking the trial in Emilia's place. They outline their stakes in why Emilia must be the one to take the trial which continues the more overt political overtones like Subaru's conversation with Roswaal had in the first loop compared to the WN.
 * During his conversation with Roswaal, the later surprisingly asks about Wilhelm and the result of the White Whale subjugation. The small talk continues which contains much nuance and info, including referencing Julia although not by name, that only those who have read Ex 2 and know about Roswaal current circumstances would fully grasp. Subaru notices that his face conflicted and oddly emotional through the exchange and doesn't quite buy Roswaal's insistence that unlike the previous generation he has no connection to Wilhelm, but lets matter drop when Roswaal changes the subject of the discussion.
 * Unlike in the WN, Subaru brings up the idea of freeing the villagers to take pressure off Emilia and discusses more about Frederica's motives. Roswaal agrees to support his idea and to convince Garf and Ryuzu about it on the condition that when he heads back to Irlam to tell the villagers their families are safe he brings along Ram with him for protection.
 * The next morning although clearly disgruntled, Ram leaves with Subaru on Patrasche. They have their normal back and forth until Subaru mentions the time he threw her. Ram has a strange reaction as if she some kind of headache and Subaru later decides to use this opportunity to talk about Rem.


 * Chapter 2
 * In this section while the scene, in general, follows the WN there are significant and numerous changes to the sequence of events and the contents are far more chaotic.
 * Subaru and Ram arrive at the village then head for mansion where they are greeted by Petra. She tells them Frederica is out in the woods so they go to see Rem. The scene in Rem's room is the same as the WN except after a moment a shocked Ram tells Subaru to leave so she can be alone with her. He obliges in hopes that some kind of emotional reaction will happen to restore her memories of Ram. He meets with Frederica in the hall and invites him for a chat and tea. The following scene similar to the WN, but instead of Subaru asking about her and Garf he brings up the incident with the pyroxene's teleportation after some probing. Frederica is baffled about that happening, but due to having taken a "pledge" (translated as "vow" in Yen Press' release) she cannot talk about the circumstances around it. Ram joins the conversation and aggressively demands that Frederica spits out what she knows, even threatening to restrain and drag her to the Sanctuary to Subaru's shock raising the tension throughout the room. Surprisingly, Frederica says there no need for that and will come with them willingly.
 * Just when everything has seemingly calmed down, Elsa suddenly appears with Petra in toe, blade to her throat instead of alone in the hidden escape passageway like the WN.
 * Utterly terrified, Petra still manages to scream in audible hoarse whisper to "run" to the three of them. However Ram and Frederica seize the opportunity to attack Elsa, the later transforming her arms into bestial claws like Garfiel, rather than using knuckles as in WN. They managed to rescue Petra and after a bit of combat then escape the room whilst Subaru casts Shamak. Frederica breaks out of the window carrying everyone at the same time.
 * They land safely in courtyard however the group notices they did not escape without a scratch. Subaru and Frederica in particular, have numerous serious wounds from the fairly large skewers Elsa had thrown and hit them with under Shamak.
 * They come under the realization that Rem and Beatrice are still in the mansion and discuss their options. This leads to Subaru and Ram getting into an argument to which Frederica defuses.
 * Frederica suggests she will act as a decoy to distract Elsa while they go get Rem and Beatrice. She discards the rest of her ruined maid uniform undergoes full beastifcation, charging right back into the floor they dropped out of.
 * The three head to the east wing and once there Subaru notices once again like in the last loop all the doors are open. Before they can deduce what is going on they are suddenly attacked by the demon beast Gulitylaw. An intense struggle ensues, Petra leads them into a nearby empty room dragging a near shellshocked Subaru followed by Ram slamming the door and barricading it. They have a brief conversation where they try to get their wits together. They come to suspect that the beast tamer from demon beast incident is here. The respite is short as Gultiylaw almost smashes through the entire door like paper how it can't quite enter the room due it's size. Ram uses El Fura to blind it by cutting out the beast's eyes while Petra and Subaru escape out the window. Ram catches up and goes to fetch Patrasche from the stables. Petra removes the thick skewer in Subaru's shoulder ties her handkerchief on to his wound to stop the bleeding as much as possible while they talk about the situation. Subaru feeling down about how out of control the loop is cheered up a bit thanks to Petra's courage. Unfortunately, the rather sweet moment ends abruptly when she suddenly gets crushed by a Warpig and Subaru's vision goes red and blacks out.
 * Subaru returns to consciousness and remembers overhears Ram a bit and then finds himself being carried by Patrasche via mouth. She desperately running through the wooded area of compound with a horde of demon beasts at her heels. The Earth Dragon is quite wounded and at its endurance is at its limit. Just as soon Subaru gets his bearing and identifies a strange weight in his hand they are attacked by the now blinded Gulitylaw who kills Patrasche in one blow.
 * Just before she dies however she throws Subaru into the 2nd floor of the east wing of the mansion,
 * Subaru comes through but notices his terrible injuries, his crushed arm, twisted, broken leg, and light headache from so much loss of blood that is barely abetting. Finally, he takes notices of Petra's severed arm in his hands and screams.
 * Elsa walks in the scene from there on is the same as the WN e.g heavy implication that Frederica is dead by showing her bloodied blade, trying to head Rem's room, but getting saved by Beatrice, etc.
 * This sequence is also the same except for two things; Subaru tries to commit suicide by stabbing himself with a broken wooden chair leg instead of biting his tongue and falling unconscious. Beatrice saves him like in WN, by tackling him and wrestling the sake out of his hands here. She heals him a bit until he notices the gospel and they have their emotional exchange until Subaru finally nears his limit from the huge loss of blood. Betty who to fixate on gospel and distraught doesn't notice it or Elsa stepping into the room. Subaru tries one last-ditch effort to stop her by grabbing her leg, but she slices off his arm the rest of his body, leading him to die here instead of being teleported randomly to Echidna's lab like in the WN.


 * Chapter 3
 * Feeling betrayed and heartbroken by the events in the previous loop, Subaru returns once again, although unaware of the subtle changes occurring within himself due to his experiences, a lack of emotion.
 * Touching upon that further, the next scene switches to just after he's brought back Emilia to Ryuzu's house when Otto starts up a conversation regarding his fairly uncharacteristic behavior.
 * Subaru eventually brushes him off once Garf joins the conversation and ask Subaru to come with him.
 * In a new scene Garf guides Subaru through the woods until they meet with a white robed Ryuzu. They discuss the Sanctuary's Barrier and a part of Frederica and Garf's heritage until Subaru once again reveals he has the qualifications to the trials and wants to take Emilia's place.
 * However it is then Garf pounces on Subaru and hoists him by his neck. The white Ryuzu reveals herself as "Ryuzu Cima (Ryuzu Shima in YP)". Garf then knockouts out Subaru through choking the air out of him and proceeds imprisons him much like in the WN.
 * The following the scene until Subaru's breakout with Otto is the same as the WN, expect it is here Garf reveals he can smell the witch's miasma on him and during his 3-day captivity he has a nightmare that recounts the deaths of people he cares about.


 * Chapter 4
 * When comes out of his confinement he notices the odd make of the building which description matches that Echidna's lab instead of a random shack in the woods that he was in the WN.
 * Opposed to the WN Ram isn't solely aiding Subaru on her own volition but on Roswaal's orders as well as, however enlisting Otto's help and drafting the plan to have Subaru escape the Sanctuary was still her idea. Because of this, he asks her to bring him to Roswaal which leads to a new scene.
 * Subaru asks about Beatrice's and Witch Cult's gospels. Roswaal provides the same exposition about them Beatrice would have in the WN. Additionally, he brings up the Book of Wisdom, marking this the first time it has come up in the narrative, while notably emitting a dark and cold feeling which chills Subaru not unlike when Wilhelm reaction to the news of the White Whale. Enough that when inquiring, Roswaal simply brushes him off returns to his normal state. Lastly, he ends the last parts of the conversation by telling Subaru to tell Beatrice he is "That Person" and he would gain her cooperation.
 * The chapter returns to the escape and Subaru meets up Ram, Otto, and Part. Garf appears and the scene goes the same as in the WN does except without POV switch to Ram after Subaru and Otto bolt leaving her and Garf confrontation off-screen which likely have changed a bit now due to Roswaal's involvement.
 * Irlam villagers have greater involvement here now because they aren't escaping with Subaru themselves but aiding his own escape.
 * As Subaru nears the entrance of the barrier Garfiel, now in tiger form, appears with an exploding shockwave. Subaru pleas with him to spare the villagers and take his life instead. Otto is killed taken the blow aimed Subaru instead like in the WN, but his emotional reaction doesn't trigger Unseen Hands here. The villagers attempt aid Subaru, but Garfiel easily slaughters them while a half-dead Patrasche appears from behind Subaru grabs him and runs away.
 * Tiger Garfiel gives chase and it's speed proves to be superior to the Earth Dragon. Using the last reserves of her strength Patrasche once toss Subaru to the barrier before being ripped in half, however as soon as Subaru pass through it Frederica's pyroxene glows and for the 2nd time he is teleported, instead of being knocked out like in the WN after landing somewhere in the forest.
 * Subaru winds up back in the Sanctuary, but it's in Echidna's lab. Frustrated and at a loss he throws away the pyroxene. Subaru his way to the entrance of the facility when he discovers that not only is it the morning of the fourth day but everything is covered in snow.
 * He reaches the Sanctuary again after some time, but can't find a single soul like in the WN. Subaru then encounters the Great Rabbit and is devoured.


 * Chapter 5
 * Because Roswaal had done so earlier, Echidna does not mention the Book of Wisdom. Instead, Subaru deduces she knows about RBD because she can see his memories which she admits afterwards.
 * Echidna's circumstances with Volcanica that were removed from the first trial are mentioned here.
 * Additionally she mentions her body was destroyed. Whether this is metaphorical or literal is not known.
 * Typhon and Minerva scenes which introduce them are also moved here from the first Tea-party. Sekhmet’s remains cut.
 * The damage wrought by Typhon to Subaru is much more severe here as his spiritual body begins breaking apart with cracks and fissures opening all over it after Typhon destroys his legs and he falls to the ground.
 * Daphne does not reveal her eye and cause Subaru to end up eating his own arm.
 * Because of the above Echidna’s inquiry about the oddness of his reaction afterword is direct between him and Typhon instead.


 * Chapter 6
 * A new scene with Roswaal happens in where he reveals his gospel during his cryptic monologue before he is eroded and devoured by the Witch of Envy’s shadows.

Re:Zero Light Novel Volume 12

 * Chapter 1
 * The Witch of Envy chases Subaru and Garfiel until they get away far enough when she suddenly turns her attention towards the mansion where she intends to go a devour whatever is left of Subaru's attachments.
 * Unlike the in the WN, Subaru actually gets swallowed by the Witch of Envy's shadows which starts destroying his sense of reason and dissolving his physical and mental connection between him and his own body. He almost becomes permanently mixed among the numerous victims of the witch whose memories, thoughts, and feelings are fragments left of them until the handkerchief Echidna enchanted activates. His sense of being temporarily restored Subaru uses the opportunity to commit suicide like in the WN narrowly avoiding an ultimate end.


 * Chapter 2
 * Because Subaru keeps his memories when he "Returns By Death" he retained his experience from the battle against the Witch of Envy in the last loop and the fragmented memories he gained by his near assimilation by her. He became fully aware of another secret in Sanctuary he was only vaguely aware before, despite having been there twice by now, Echidna's lab. Enlisting Ram's help to distract Garf so he can't interfere, Subaru goes to search for the laboratory and finds it through the intuition of those memories which is a contrast to the WN where Beatrice had randomly teleported him there instead.
 * In a direct reference to Ex 2, during the conversation between Ryuzu Bilma and Subaru, it is confirmed that Sphinx was the very first clone created by Echidna who inherited her knowledge and power most of the clones and was been slain by Julia.
 * After the long discussion with Bilma at her house on the way, back to the residential area of Sanctuary, a new scene happens where Subaru runs into Emilia out for night scroll to clear her mind where a new conversation takes place.
 * After that Subaru goes to the cathedral another new scene happens, but this time with Otto.
 * Order of when Subaru writes the letter to Emilia and leaves the Sanctuary and his conversation with Garf is switched with the former happening much earlier.


 * Chapter 3
 * Subaru arrives in the early mansion again and successfully convinces Frederica and Petra to escape to Irlam Village thus preventing their deaths from happening in the mansion like it did in the WN.
 * Frederica talks about some of history between her and Garfiel here which deals with why she left.
 * The conversation between Beatrice and Subaru is mostly the same only without exposition regarding the gospels as Roswaal had already provided it. The skirmish with Elsa however is a bit different because Subaru and Beatrice manage to escape from the manor after Beatrice's first Shamac. Elsa also mentions as a response to Frederica and Petra leaving the mansion she and Meili split the targets between them.
 * On the way out of the mansion and on the road Subaru notices smoke coming from the village and rushes with fear that he may be too late. He runs into Meili on the way who introduces herself as "Meili Portroute", unlike in the WN where she didn't appear until the last loop nor did she have a last name. Meili confirms that Frederica and Petra are dead, as are likely Rem, Patrache and the villagers.
 * Elsa catches up and tries to attack Beatrice, but the later blocks the strike with magic and counters with Minya which blasts Elsa almost entirely into pieces just like the WN.
 * Beatrice then prepares to finish of Meili but Subaru objects due her being a child but Beatrice and Meili both refute his plea, then just like in the WN Beatrice suddenly pushes Subaru away taking the fatal blow from Elsa knife meant for him.
 * Dumbfounded Subaru inquires if Elsa is immortal, but Elsa denies it the notion and mentions she got this power from a rather malicious person.
 * A few moments later Elsa gouges his eye out much like what Garfiel did in the WN but immediately something interesting happens, a not yet completely dead Beatrice who is lying the ground with her hand outstretched to Subaru uses the last of her "od" to activate the teleportation spell inside the pyroxene and warp Subaru away. The scene highly implies the Beatrice had been behind all the teleportation incidents up till now.
 * Comes to find himself inside the lab again. He wraps his torn jacket sleeve around his left-eye socket and head. When he leaves the facility, he came face to face with the snowbound sanctuary again only in the middle of its snowstorm.


 * Chapter 4
 * Because Subaru had entrusted Rem to Frederica earlier as she and Petra left for the village, so the small scene of Subaru carrying Rem to the Sanctuary does not happen.
 * Likewise because Elsa does not leave him alive like in the WN and he is instead teleported out of the mansion grounds to escape her thanks to Beatrice, the mention of Subaru burying Frederica and Petra's bodies in the village does not occur nor does a strange unexplained pile of flesh appear since Subaru does not go there before sanctuary.
 * Subaru uses his command authority to summon one of the nearby Ryuzu (Piko) clone to guide him through the snowstorm.
 * Emilia does not get Subaru's letter so their dialogue at the tomb is changed slightly to reflect that but otherwise it has no barring on the outcome of her deteriorated mental state nor changes the overall conversation.
 * During Subaru's confrontation with Roswaal, the events of Memory Snow are referenced and now play a role in the plot here. Subaru also does not summon the Ryuzu clones to apprehend Roswaal as he generally to battered by the events.


 * Chapter 5
 * Out of the 7 parallel worlds seen in the WN only 4 are shown in the LN during Subaru's 2nd trial. The rest are still implied to have happened off-screen via illustration (except for his first death by Petelgeuse since it did not happen in the LN) and the repeated passages which were also present in the WN. Timelines of particular importance that are focused on:
 * 2nd suicide at the end of Arc 3. Cuts away before Subaru's body is possessed by the Witch of Envy and Puck attempts to freeze everything. Unknown if this is an abandoned plot thread or something the author is leaving for latter.
 * Death at hands of Julius and Ferris in Volume 8 and episode 23 of anime.
 * 1st suicide at the cliff at end of Volume 2 and episode 7 of the anime.
 * The battle between Reinhard and Puck that would have occurred in Volume 6 and episode 18 of the anime.
 * The short post chapter 71 intermission chapter where the witches discuss parallel worlds is cut, although Echidna's discussion with Subaru still remains in Chapter 6.


 * Chapter 6
 * Echidna's monologue is shorter, but still takes up 4 pages.
 * Although the sequence of events is the same as WN during the confrontation Echidna, by the end of it all the witches are present.
 * When Satella appears everyone's tension is very high except with Typhon who greets her cheerily, giving nod to the fact that she and Minerva were the closest to her in the past.
 * Minerva's observation about Satella directing her jealousy towards her if she steps inbetween her and Subaru, has been removed.

Re:Zero Light Novel Volume 13

 * Chapter 1
 * The chapter covers the rest of the third tea party. Some dialogue at the beginning is rewritten.
 * Unlike in the WN, it is not mentioned that Satella killed the other witches, which implies that was work of her witch personality which this is the reason why everyone but Echidna is not antagonistic towards her.
 * Daphne jumps out of her Centipede coffin and uses it to restrain Typhon while comforting Sekhmet. It's noted that Typhon's authority ineffective against it because does not have a mind making it the perfect counter.
 * The post-chapter 79 interlude is entirely cut.


 * Chapter 2
 * Most of Subaru's long monologue about his next step is cut, and the scene jumps almost immediately to the conversation with Roswaal, which begins the same but has major differences.
 * Roswaal spends less time talking about how useless Emilia is, instead his dialogue is more dedicated towards convincing Subaru to to trample on her will for her sake.
 * As the convincing fails, Roswaal basically confesses straight out that he is responsible for the mansion attack.
 * Instead of throwing threats at Roswaal like in the Web Novel, Subaru begs him to stop the attacks.
 * Roswaal has a new speech regarding that Ram and Subaru are his only hopes in this world, and that he sincerely believes in him.


 * Chapter 3
 * The bet between Roswaal and Subaru is changed, causing the contents to be changed as well.
 * Subaru and Roswaal make a contract regarding their failure conditions as in the WN, but difference is that Subaru is not aware of it is a soul-binding contract.
 * Subaru’s victory condition is changed from “I will get Garfiel on our side and make Emilia pass the trials” to “I will prevent the disasters at both the Sanctuary and the Mansion”.
 * The time-limit for the snow-fall and mansion attack is in three days, instead of five.
 * Ram spies on the discussion using her clairvoyance & then leaves Subaru a clue a about source of Emilia troubles with the trials.
 * During Subaru & Otto's briefing on the progress of their plans, they both reaffirm that getting Garfiel on their side is a necessary step for liberating Sanctuary & begin laying the groundwork for that part despite Subaru's reluctance.
 * As Subaru arrives at the lab, he meets Ryuzu Alma, and they talk about various things similar to the Web Novel(what Ryuzu knows about Roswaal’s plans, the clone system of Ryuzu’s, how the whole “some people are against the Sanctuary’s liberation” was a lie, how Garfiel challenged the trial as a child, and was brought out by another Ryuzu, Garfiel mother, etc.) This replaces the scene of Subaru running around and talking to different Ryuzu in the Web Novel.
 * Subaru meets with Shima sometime afterwards, just like he did with Theta in the WN and gains her cooperation, but it happens off-screen as most was talked about was covered by his dialogue Arma, while other parts of it where rearranged into vol 14. This occurs after new scene with Garf in Ch 4 spoken about below. The most important bit: the Sanctuary's past is also moved to vol 14 instead.
 * There's a new scene where Subaru wants to talk about Emilia's trials with Puck. However, as he hadn't shown up, Subaru placed both his hands on Emilia's neck as if to strangle her, even apologizing afterward, but doesn't actually do it because he feels strange backlash emitting from the crystal in which Puck responds to Subaru from it but without materializing.
 * The conversation between Puck and Subaru happens off-screen.


 * Chapter 4
 * There is a really short new scene added where Puck forces himself out of his crystal to say goodbye to Emilia.
 * There's a new scene added where Garfiel wakes up in the middle of the night, and talks to Shima about Emilia losing Puck.
 * Contrary to the Web Novel, Garfiel is completely away about Shima being different from the other three main Ryuzu Meyers.
 * When Garfiel reaches the lab, he meets Otto. After some talking, he punches Otto away and starts to leave, but on the way, he realizes that he lost his Pyroxene Crystal, which Otto stole from him.
 * There are added scenes from Garfiel's perspective, to make it easier to understand his thoughts and perspective compared to the Web Novel.
 * Emilia is still shone going through effects of experiencing the fragments of her pre-trial recollections, but we don't see the scenes themselves until vol 14.


 * Chapter 5
 * The entire fight between Ram, Otto Suwen, and Garfiel Tinsel, has been streamlined considerably from the Web Novel.


 * Chapter 6
 * Some additions/changes were made to Subaru’s inner monologue to clarify or add to his thoughts.


 * Chapter 7
 * The fight between Subaru and Garfiel has been slightly streamlined.
 * Subaru is direct to the point during the fight, and questions if Garfiel still hates that his mother abandoned him. Which caused Garfiel to tell him what happened to his mother.
 * Subaru uses Invisible Providence for the first time, hitting Garfiel square in the face, sending him flying backwards.


 * Chapter 8
 * The conversation Emilia had with Roswaal after Subaru's fight with Garfiel is moved to volume 14.
 * At Garfiel's trial, Echidna doesn't show up to talk to him, resulting in all the dialogue with her being cut, while the rest remained the same.
 * The small conversations Emilia has with Ram & Otto before going to her trial are cut, but the one with Subaru is kept, and everything else is the same up until Emilia meets Echidna and announces herself as a Witch while making a pose.

Re:Zero Light Novel Volume 14

 * Chapter 1
 * Emilia's pre-trial recollection scenes that were previously scattered through the last 3rd of Web Novel are combined and shown here.
 * The very first scene from Bond of Ice where Emilia & Puck first meet, is added.
 * Echidna describes the trial as a "physiological preparation".
 * Echidna has a somewhat surprised reaction to the seal.
 * Petelgeuse and Fortuna have additional dialogue which mentions that once, a long time ago, Fortuna had a fever, and Petelgeuse nursed her back to health.
 * The surroundings of the seal are different from the Web Novel counterpart, it's now surrounded by white trees and looks like a sacred place.
 * Chapter 2
 * The flashback is significantly extended.
 * The Original Ryuzu Meyer was an apostle of greed. She was 12, and Roswaal who was 4 years older than her, was 16.
 * Ryuzu considers Roswaal as her senpai, and she thinks that Beatrice and Roswaal have a brother-sister relationship.
 * The original Roswaal's name was Roswaal A Mathers.
 * Hector gets a more descriptive appearance and his conversation with Echidna is also longer. Echidna casting a fire ball has also been omitted in the LN, however, the two still seem to fight.
 * The goodbye scene between Beatrice and Ryuzu mentions that the crystal contains a lot of Mana, and Beatrice brings up teaching Ryuzu to read and write.
 * Chapter 3
 * Pandora's line "For the fulfilment of cardinal desire of us Witch Cultists," is changed to "shall we steal the seal and the key? for the fulfilment" making her goals more direct.
 * Petelgeuse's dialogue before being granted the Seat of Sloth is expanded. Now, Petelgeuse expresses his reasonings for his actions, as well as the reason he's willing to subject himself to such a cruel demise.
 * Petelgeuse's finger states that Regulus is the leader of the Radical Faction of the Witch Cult, which is not present in the web novel.
 * The conversation between one of Petelgeuse's finger and Arch has additional lines mainly about how there shouldn't be more than 7 witches and aside from the Witch of Envy who is sealed in a desert far from here are dead.
 * Child Emilia has a much clearer reason for heading into the inner forest where the seal is.
 * Chapter 4
 * Fortuna gives Emilia her hair ornament
 * The Light Novel mentions that during the time Emilia and Puck lived together in Elior Forest, she would religiously polish and talk to ice statues without understanding the guilt that accompanied it until now
 * Chapter 5
 * Omega doesn't appear, but otherwise the conversation between Subaru, Otto, and Garfiel is the same.
 * There is a slight rearrange and some different lines but the confrontation between Roswaal, Subaru, and Garfiel is otherwise the same as the Web Novel.
 * Roswaal does not destroy the room he was in, following the trio's departure.
 * There is a new scene where Subaru, Otto, and Garfiel discuss what to do about the attack on the manor.
 * A scene is added where the villagers see Subaru, Otto, and Garfiel off, as they depart for the manor which contains a lot of setup for the Volume 15.
 * Subaru tosses the Pyroxene Crystal Puck is in, to Ram instead of Garfiel, giving an unnamed colorless crystal to Emilia.
 * Chapter 6
 * Emilia and Roswaal have their conversation from chaper 114, which has some additions, but otherwise stays largely the same.
 * Roswaal and Ram have an additional conversation after Emilia leaves for her 2nd trial about his plans.
 * The previous skip scene where Ram made a deal Otto is recalled here via flashback with the conditions slightly changed.
 * 1) Slow down Garfiel but leave the final confrontation to her, 2) Tell Subaru to think of ways to cheer Emilia up, 3) Don't tell Subaru why she is joining the gamble.
 * Ram tracks down Roswaal through her clairvoyance and prepares to confront him. Puck emerges from the pyroxene to assist her for his own reasons relating all the way back to Bond of Ice.

Re:Zero Light Novel Volume 15

 * Chapter 2
 * Archi transforms into Echidna at near the end of the 2nd trial.


 * Chapter 3
 * Instead of running off with Rem, Frederica participates in the mansion battle by holding Meili off while the others escape.


 * Chapter 4
 * Emilia's conversation with Sekhmet is replaced with her talking to Minerva instead. The scene is subsequently entirely different.


 * Chapter 5
 * Garfiel & Frederica fight off Elsa & Meili together.
 * Frederica saves Meili from the debris that nearly crush her.
 * There also smaller changes that make the fight more "raw", such as Garfiel biting Elsa and her betting him back.


 * Chapter 6
 * Roswaal displays some new magical spells and abilities, such as his Twofold, Threefold, Fourfold and Fivefold Magic, which allowed him to cast multiple higher spells simultaneously using various parts of his body. Furthermore, a new ability is added, which allows Roswaal to rewrite the composition of a spell and absorb the spell's mana.
 * Roswaal reveals that he had meddled with Emilia & Puck's contract during her depression in Arc 3, which appatently was the reason for why Puck could not suddenly appear after returning from the Capital in contrast to the WN, which has no explanation for this. He learned to do this thanks to his close relationship with Beatrice.
 * Puck reveals he knows Hector.
 * Puck makes an illusion of his Starbeast from which rattles Roswaal for a moment, prompting him to cast his strongest spell at the illusion (he notes he was unable to use Sixfold magic-his trump card-therefore his chances against Beast of the End were slim.
 * Puck saves the villagers from he sudden snowstorm by making walls of ice to protect them with last of his mana, off-screen.
 * The scene between Emilia, the Arlam villagers & Sanctuary residents have been modified slightly with extend dialogue.
 * There is a new scene with Emilia & Ryuzu clones. The Clones are trying to prevent the overseer Ryuzu to stop Shima from taking away the Pyroxene Crystal hosting the original Shima.
 * Shima gives Emilia the Pyroxene Crustal Puck is in, before saying her good-byes to her & other clones after which she disappears together with giant mana crystal the original Ryuzu is in.


 * Chapter 7 
 * Al Huma trapping the Great Rabbit is replaced by a new combined spell called "Cocytus" created by Subaru & Emilia to trap the Demon Beast instead.


 * Interlude
 * A new and clearer explanation about oaths, pacts, covenants & vows is added.
 * Roswaal reveals the vow and the sealed curse engraved on his skin and soul, which was the result of losing the bet with Subaru, who was unaware of that extra per-caution. The rest is the same.


 * Final Chapter
 * Emilia does not talk about the rest of her past to Subaru, which mentioned the Dragon's Blood. Instead, they make a promise to talk about it in her room, after the ceremony. Note that this exposition was already covered in Volume 4 of the the Light Novel.
 * Although the meat pie incident is not included in the LN, it is still referenced, therefore it is still canon.


 * Extra
 * Instead resurrecting herself through the body of the original Ryuzu Meyer like in web novel, Echidna used the body of Ryuzu Shima who became her host following Garfiel's first trial. When Ryuzu entered the tomb, Echidna latched a part of her soul onto her, and for the next decade, she steadily poured more and more of her soul into Shima, with the goal eventually taking it over and escaping the Sanctuary. She also names her herself Omega based on Subaru's knowledge to empathize the idea that she is the last clone.