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 and is currently the longest arc.

Overview
Subaru is broken by the loss of Rem. Later, he and Emilia arrive at the Sanctuary to bring back the villagers of Irlam Village. 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 Lewes clone who seemingly guides him to the tomb. This leads to a few events being rearranged and the pacing being faster than 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 existences of other the 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 effect of her tea making the Sloth Witch Factors active. It also mention 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 Lewes Burma as the first Lewes Meyer copy.
 * Lewes reveals to Ram to be an elf, making her actually a half-elf. This fact that 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 a 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

 * The entire fight at the mansion against the Demon Beasts and Elsa Granhiert is completely different.
 * Frederica has beast transformation like Garfiel, which she uses in the fight.
 * Instead of Beatrice teleporting Subaru to the Sanctuary where he would get slaughtered by the oousagi, he is killed by Elsa at the mansion.
 * Subaru confronting Roswaal is rearranged.
 * A new Lewes Meyer is introduced during the imprisonment of Subaru, named "Lewes Cima".
 * Roswaal revealing that he has a Gospel is completely moved to the next volume, thus removing the Rem strangulation scene.

Re:Zero Light Novel Volume 12

 * The Pyroxene Crystal is somehow to Lewes Meyer's crystal.
 * Meili shows up in person and her Demon Beasts kill Petra, Frederica and Rem, and probably the rest of the village too.
 * In the Web Novel, Meili didn't have any last name. However, in the Light Novel, she's named Meili Portroute.
 * A flashback where Subaru, Wilhelm, and the entire expeditionary force was killed by Petelguese in Irlam Village, and Puck's battle against Betelguese, was cut because of the changes in volume 8 where did not happen.
 * Elsa's calls her regeneration a kind of "Blessing" (祝福), which she gained from someone malicious.
 * The reveal of Roswaal's gospel is moved to his confrontation of Subaru's "Redo" power.

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.
 * 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 let go off her.
 * 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 asks 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 don't sign a soul-binding contract regarding their failure conditions.
 * 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.
 * As Subaru arrives at the lab, he meets Lewes Alma, and they talk about various things similar to the Web Novel(what Lewes knows about Roswaal’s plans, the clone system of Lewes’, how the whole “some people are against the Sanctuary’s liberation” was a lie, how Garf challenged the trial as a child, and was brought out by another Lewes, Garf’s mother, etc.) This replaces the scene of Subaru running around and talking to different Lewes in the Web Novel.
 * Beatrice's past at the Sanctuary and the attack of Hector are moved to the next volume.
 * 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 afterwards, but doesn't actually do it because he feels strange backlash emitting from the crystal in which Puck responds to Subaru from it.
 * The conversation between Puck and Subaru happens offscreen.
 * 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 Lewes Cima about Emilia losing Puck.
 * Contrary to the Web Novel, Garfiel is completely away about Lewes Cima being different from the other three main Lewes 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 Suwen 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.
 * 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 telling what happened to his mother.
 * 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 conversations Emilia has with Ram and Otto before going to her trial are cut, but the one with Subaru is kept, and everything else is mostly 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 last 3rd of Web Novel are combined and shown here.
 * Echidna describes the trial as a "physiological preparation"
 * Echidna's has somewhat surprised reaction to seal.
 * Geuse and Fortuna have addition dialogue which mentions that once, a long time ago, Fortuna had a fever and Geuse nursed her back to health.
 * The surroundings of the seal are different from the Web Novel, it's now surrounded by white trees and looks like a sacred place.
 * Chapter 2
 * The flashback is significantly extended.
 * The Original Lewes Meyer was an apostle of greed. She was 12, and Roswaal who was 4 years older than her was 16.
 * Lewes considers Roswaal as her senpai, and she thinks that Beatrice and Roswaal are like 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
 * The goodbye scene between Beatrice and Lewes mentions that the crystal contains a lot of Mana, and Beatrice brings up teaching Lewes 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 fulfillment..." making her goals more direct
 * The conversation between one of Gesue'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 much clearer reason for heading into 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 Garf is the same.
 * There is a slight rearrange and some different lines but confrontation between Roswaal Subaru and Garf but it is otherwise the same as the Web Novel.
 * There is a new scene where Subaru, Otto and Garf discuss what to do about the attack on the manor.
 * A scene is added where the villagers see Subaru, Otto and Garf off as they depart for manor which contains a lot of setup for the volume 15.
 * Subaru tosses pyroxene Puck is in to Ram instead of Garf giving an unnamed colorless crystal to Emilia.
 * Chapter 6
 * Emilia and Roswaal have their conversation from ch 114, which has some additions, but otherwise largely the same.
 * Roswaal and Ram have an addition conversation after Emilia leaves for the 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 Garf but leave the final confrontation to her, 2) Tell Subaru to think of ways to cheer Emilia, 3) Don't tell Subaru why she is joining the gamble.
 * Ram tracks down Roswaal through her clairvoyance prepares to confront him and Puck emerges from the pyroxene to assist her for his own reasons relating all the way back to Bond of Ice.


 * Chapter 7