Natsuki Subaru (ナツキ・スバル) is the main protagonist of Re:Zero kara Hajimeru Isekai Seikatsu. He was a hikikomori that was transported to Lugnica through unknown means, and given the ability to Return by Death by Satella. He officially became Emilia's knight following the incident at the Sanctuary and is later revealed to have the necessary qualities to become a Sage Candidate.
Natsuki Subaru, as a Japanese teenager, was of Asian ethnicity. Of his two parents, Subaru took after his average-looking mother rather than his handsome father. His brown eyes, which were inherited from his mother, had small irises that made the whites of his eyes stand out,due to his sanpakugan. Unfortunately, inattentive people found Subaru's eyes to look intimidating, although some such as Emilia liked them. One trait he did take from his father was his medium-length thick black hair which was swept back and fairly unkempt. In Japan, Subaru had tended to his hair personally, no doubt contributing to its disarray. Due to traits such as his short ears and flat nose, Subaru wasn't considered especially attractive or unattractive. Back in Japan, he was the kind of person who would fit in perfectly with a crowd because of his complete lack of any outstanding features. As a shut-in who had nothing better to do all day, Subaru used to train his body, resulting in a physique that was slightly muscular yet not too much. He stood at five feet and eight inches tall, which was roughly average height.
Subaru's most common choice of clothing was the cheap outfit he was summoned in. The ensemble consisted of deep-grey tracksuit bottoms with an orange stripe down the side, black sneakers with vibrant orange laces and soles, and a black t-shirt. Additionally,Subaru wore a zipped-up white tracksuit jacket with a stand up collar, deep-grey sleeves with an orange line running down their sides and orange cuffs, and deep-grey shoulders. On the left breast of the jacket was a black brand symbol that was reminiscent of the letter "N."
During his adventure in the Pleiades Watchtower in Arc 6, Subaru wore an outfit better suited for travelling. The outfit in question consisted of an orange scarf that matched the color featured on his track suit, black trousers tucked into lighter brown boots with black lacing, a black shirt that matched the shade of his trousers, a light brown buttoned blazer worn atop the shirt that ensured that only the shirt's collar was visible, a brown belt matching the shade of the boots, and an open green jacket. He also occasionally wore a long black hooded cloak alongside the outfit.
In the Sloth What-IF story, where Subaru chose to abandon Emilia to run away with Rem, Subaru's hair was longer. Although he kept his basic messy hairstyle, Subaru now had a clump of hair tied up in a ponytail, apparently influenced by the style of Wilhelm van Astrea.
While Subaru tends to not read the situations he encounters, ultimately leading him to make irrational decisions, he is loyal to those he holds dear, willing to help them, even if that means taking the thorny path. He has his resolve confirmed through the many situations and circumstances he faces in the fantasy world, originally having been one to always take the 'easy' route. As a shut-in NEET, he is hopeful of the possibilities that being sucked into a new realm brings, but later realizes the realities of the predicament he is in. Eventually, he resolves himself to be faithful and protective of the ones that he cares most about.
Beneath his eccentric demeanor, however, Subaru is actually a very insecure person suffering from a severe inferiority complex due to growing up in his father's shadow. This also caused him to develop a fundamental misunderstanding of relationships where he believed he would be abandoned if he wasn't the center-of-attention. Even his otaku-tendencies were really just another method he used to stand out. Ironically, though, these desperate attempts to connect to others only caused him to make a fool of himself and push others away. It wasn't until he was transported to Lugnica that Subaru finally met people who accept him for who he is and he began learning how to build genuine relations.
Subaru is first seen at a local Japanese convenience store, buying consumer goods. After leaving the store, he somehow ends up in a fantasy world, after the atmosphere around him distorts itself. Confused by the happenings around him, Subaru later realizes that he has been sucked into another world.
Back in his original world, Subaru was the only son to two odd, but well-meaning parents. From a young childhood age, Subaru idealized his dad in particular, a popular man in his community who was highly talented in whatever he did, a loving father who prioritized his family above everything else, and had a boisterous personality that charmed anyone he met. Kenichi was everything he wanted to be and growing up around him had a huge influence on Subaru's life. Taking pride in being his son, Subaru worked to live up to the expectations that came with that in his mind. For a time, he achieved this, as Subaru found himself smarter, more physically able, and popular than his peers. When he received praise, Subaru would of hear how it was expected of him being Kenichi's son, which made him feel special and entitled to a sense of superiority.
However, as the young boy's small world started to gradually expand upon entering middle school, Subaru would come face to face with limits of his own ability. Suddenly, he found people who were becoming smarter and faster than he was and, in general, being better at the things he used to be. He felt as if he was slowly losing his place and began to harbor a deep sense of shame at letting down his parents and fear of everyone leaving him for failures, doubt and self-loathing began to develop in his heart. But rather than prioritizing getting better at those things to combat his anxieties, Subaru instead placed more importance on doing daring and outrageous things to maintain his fragile dignity and keep himself the center of attention. However, the more reckless Subaru's actions became, the fewer people wanted to be around him. Yet Subaru continued to deceive himself and believe his own lies because as the son of his seemly indomitable father, he couldn't be seen as a failure. Eventually, one day, Subaru noticed he no longer had any friends and in his loneliness, Subaru realized he wasn't anyone special.
From then on, the comparisons between his father and himself turned into a curse that wounded and suffocated him everywhere he went, yet his strong admiration for his dad made it impossible to show that pain to anyone. Eventually, he stopped trying to stand out and when high school came, he found himself in a new environment where no one knew his past. Seizing this opportunity, Subaru tried to build new interpersonal relationships, but he had no idea how to be himself around others and instead only ended up emulating his father, his only frame of reference which instead led to others to treat him as a clown and classmates simply ignored his existence altogether. One day, Subaru skipped a day of school out of lack of enthusiasm, which slowly turned into a constant thing until at one point, he hadn't been to class for three months. When out of public spaces, Subaru felt liberated, but more than that, his own degradation meant people would start distancing him from Kenichi and in a twisted sense of hope, his parents come to acknowledge him as worthless and cast him aside in self-abandonment.
After being summoned to a new world, he saw this as a chance to make a fresh start; however, he didn't change as a person. He decided that he would save Emilia, and eventually, he was exposed for what he was, a person forcing their feelings on someone else, and that his white-knighting doesn't work out in the real world. He thought of himself as the hero of his own story, but was faced with reality when he didn't have the overpowered abilities of a usual protagonist, he however chose to ignore that he wasn't the hero and that the world would go on with or without and tried to force his way into Emilia's affairs, and in the process making a complete fool of himself.
The world then proceeded to show him how weak he was, and that he couldn't save anyone, after being utterly broken, he wanted to run away but was however stopped by Rem. This became the turning point for his character; he truly made an effort to change himself rather than expect that as the supposed protagonist, everything would work out, which it didn't before as he had to watch the results of his failures and see the people he cared for die over and over again. Subaru indeed became a changed character, and he tries to live up to the expectations of a hero that Rem had for him.
According to the author, after Subaru went missing (was transported to the Kingdom of Lugnica), a police investigation was launched but ended up empty-handed.
Return by Death (死に戻り Shinimodori): Subaru's trump card and the most recognised ability from the series, Return by Death, allows Subaru to return back to an unspecified, unpredictable and uncontrollable "save point" after his death. It happens instantly after his life is taken and there's no lag between the point of death and the point of resurrection. To Subaru, it looks exactly as if someone switched camera angles inside his head and the sudden influx of new information and sensations often makes him feel dizzy and confused. This ability was given to him by Satella as a means to help him save the ones he loves, should he need it. In the beginning, he himself referred to it as a curse but later started to view it as some sort of a blessing, though he's still having a hard time fully accepting it and its side effects.
- Penalties: Subaru is unable to reveal his ability to others. There are three primary penalties for attempting to do so:
- Subaru will be forcibly and painfully silenced by the Witch's hand, and, in some cases, die.
- If Subaru was to tell Emilia about his ability, it would end in her heart being crushed by the Witch's hand. The exact explanation about this penalty is currently unknown, as according to the author, this penalty only affects Emilia and no one else.
- It will increase the density of Witch Factor at least for a short time, which will draw any Demon Beasts in the immediate area to him like moths to a flame.
- Future Recollection: The trait that makes Subaru so dangerous is without a doubt his ability to recall the futures he had experienced through Return by Death. The fact that he can recall the events of the previous loops he had died in, means that Subaru inherently knows the rough actions the people around him will take, almost like a form of precognition. As he usually tries to do different things every time he returned to life, Subaru is able to gather more intel on how his allies and opponents behave under specific conditions, allowing him to predict their movements and plan strategies accordingly. Although he is no genius, Subaru's recollections of failed futures as well as his basic problem solving abilities essentially turned Subaru into a someone who expertly manipulates the events around him. Despite being an unemployed delinquent with no future, within a year of arriving to the other world, Subaru had orchestrated the downfall of the Sin Archbishops of Sloth, Greed and Gluttony, the Bowel Hunter Elsa Granhiert, and two of the Three Great Demon beasts—the Hakugei and the Oousagi. His recollection of the future also allows him to forge better relationships with those he considers allies, allowing him to amass an impressive web of political connections and friends in high places.
Authority (権能 Ken'nō): Subaru is currently able to use two Authorities: Sloth and Greed. According to Echidna, Return by Death also seems to be an Authority gifted to him by Satella, but no actual conclusions have been drawn so far.
- Authority of Sloth (怠惰の権能 Taida no Ken'nō): After Petelgeuse Romanee-Conti's death, Subaru became the current holder of the Witch Factor of Sloth, enabling him to develop an Authority of Sloth.
- Invisible Providence (インビジブル • プロヴィデンス Inbijiburu Purovidencu): When Natsuki Subaru personally killed the Sin Archbishop of Sloth Petelgeuse Romanée-Conti, he absorbed the Sloth Witch Factor that resided within the sadistic madman. Strangely enough, Subaru's Authority of Sloth manifested itself in almost entirely the same way as Petelgeuse's and Sekhmet's did. Unlike Petelgeuse who called the power the "Unseen Hand,"after Echidna synchronised his body and the Witch factor of Sloth, Subaru manifested an Authority of Sloth Subaru chose to call his version of the Authority "Invisible Providence." Invisible Providence was a power that allowed Subaru to summon invisible hand-like appendages from his chest that he could move and extend telekinetically. One of these hands was strong enough to tear through flesh, bend and break bones, and shatter rock. If Subaru focused enough, he could make the tendrils of Invisible Providence phase through matter as though it wasn't there. Subaru's version of the Authority of Sloth was far less potent than both Petelgeuse's and Sekhmet's, as, although Petelgeuse for instance could summon roughly one hundred hands at his maximum potential with little effort, Subaru could only summon a single hand with minimal range and damage output.
- Authority of Greed (強欲の権能 Gōyoku no Ken'nō): After the death of Regulus Corneas, Subaru became the current holder of the Witch Factor of Greed, enabling him to develop an Authority of Greed.
- Cor Leonis: A somewhat reverse form of Regulus' Lion's Heart which Subaru gained in Arc 6. Similarly to Regulus' Authority of Greed, Cor Leonis has two phases; First Shift and Second Shift. First Shift allows him to take on the physical and mental burdens and fatigue of others, effectively eliminating problems such as injuries or lack of dexterity for his comrades in combat. He is also able to shoulder fatal injuries and save his allies' lives, however, at a cost of receiving the same wounds himself as his body naturally reproduces the sources of pain he suddenly receives; a deadly side effect which can easily kill him, if ignored. When using this phase, Subaru is able to locate his allies' position and status as he sees pale white dots, wherever they're located. It only works on people he recognizes as his friends and allies. Second Shift or Division of Labour, however, works very similarly to Regulus' very own Lion's Heart, in a sense where Subaru can divide the burden between the allies of his choosing. He can freely regulate how big of a burden he'll employ on each person, kind of like opening or closing a tap. Naturally, the same side effects will apply to each and every bearer of the shared burden, meaning their lives rest in Subaru's hands for the entire duration. The only condition for using the Second Shift is that the person Subaru wants to share his burden with, must be willing to accept his burden and open their heart to Subaru.
Magic: In the world Subaru was summoned to, individuals were capable of manipulating magical energy known as mana because of a "gate" that existed within every person's body. This gate would draw mana into a body as well as expel it out, functioning as a kind of faucet for magical energy. Each person possesses a different elemental attribute that allow them to produce magical spells related to that element. Of the six elements, Subaru's designated element is Yin Magic, a fairly rare attribute. Although he was a novice, Subaru had the capability to cast very basic-level Yin Magic spells. However, after overusing his gate, it became defective, meaning he could no longer cast any kind of magic. He is still able to use Yin magic through Beatrice, though Beatrice has run out of her mana supply when fighting the Oousagi, rendering both unable to use any kind of spell that isn't too complex.
Spirit Affinity: Subaru has a rare innate gift to form contracts with spirits.
Spirit User (精霊使い Seirei Tsukai): Subaru is contracted with the Artificial Spirit Beatrice, though according to her, he isn't a true Spirit User. She also has a terrible mana consumption rate and formerly got around this by draining mana from people in the mansion using the library as a medium. After their initial fight against the Oousagi, Beatrice depleted her mana reserves in its entirety, meaning she's barely able to cast basic level magic. As she is an Artificial Spirit, she also has several conditions Subaru is forced to follow:
- Subaru cannot form a contract with other Spirits.
- Beatrice cannot restore mana on her own.
- Beatrice cannot use the mana in the atmosphere.
- Beatrice can only drain mana from Subaru.
Spirit Arts (精霊術): Subaru is capable of using Spirit Arts with Beatrice, and is thus able to use Yin Magic with her aid. He has also created a number of original spells with her, unique to the pair. He is able to use
- Minya (ミーニャ): Subaru can create stakes made of crystallized mana covered with light purple flames as an offensive attack via Spirit Arts. They are strong enough to penetrate defences. Any stakes in the air explode and release smaller stakes that fly in all directions which then rips targets apart
- El Minya (エル・ミーニャ): The spell works very similar to normal Minya. The only difference is the number of stakes, which increase to around 40.
- E・M・M (エミリアたんマジ女神 Emiria-tan Maji Megami, "Emilia-tan is Seriously a Goddess"): E・M・M is an "absolute defence magic". Beatrice uses Yin Magic to interfere with the time and space around Subaru, and while he can't move during activation, he experiences no interference from outside the barrier. It is similar to Regulus Corneas' Lion's Heart, but doesn't have the same risk, renders Subaru and Beatrice unable to move and can be used until mana runs out.
- E・M・T (エミリアたんマジ天使 Emiria-tan Maji Tenshi, "Emilia-tan is Seriously an Angel"): E・M・T is an "absolute negation magic." A spherical field several ten meters long with Subaru and Beatrice at the center is created, which negates effects from mana within it. Julius remarks that it is useful against mages and those who use mana to assist their techniques. However, the magic only negates the use of mana, and so it has no effect against opponents who fight without it.
- Shamak (シャマク Shamaku): One of the most basic shadow magic spells, and the only spell Subaru could use until the collapse of his gate, was "Shamak." When cast, a blanket of black smoke would erupt from the user that would cover a significantly large area. Any target engulfed by the smoke would completely lose their spacial awareness. Under the spell's effect, the only thing the target could sense was the ground under their feet and any damage done to their body. Although it was a low-level spell, it proved an effective smokescreen when retreating or for masking attacks. As it was the only spell he was capable of using, Subaru was particularly fond of Shamak .he used it a number of times, and even came to grow attached to it, calling it "Shamak-san." He is still able to use the spell through Beatrice.
- Murak (ムラク): Subaru reduces the effects of gravity. Just by jumping lightly, a person can jump as if they had springs. If Subaru wishes to, it can also be used to fly, although Subaru will get blown around by the wind like a leaf, but they won't flip around in midair.
- Rental Goa: Not being one of his spells made after forming a formal contract with Beatrice, this was instead a makeshift fire spell created on the spot during Subaru's provisional contract with Ia. It was used against Petelgeuse to set him on fire after being doused in oil.
Melee Fighter: Subaru grew up an active athlete in his early years in his school, and although he drifted from partaking in any school activities prior to his transportation to the new world, he nevertheless still maintain a strict fitness regimen and as a result, he has raw athletic prowess and a high degree of physical strength, reflex and stamina. Despite all that, Subaru is not a skilled as the very vast majority of the warriors he has met in his two years of living in the New World and can barely hold his own against normal people–according to the author, a fistfight between Otto and Subaru would always end in Otto's win. To somewhat make up for his fighting shortcomings, Subaru has sharp reflexes and demonstrated it when he was able to dodge Felt's confused swings when she confused him for an intruder and Rem's flail attack in the second attempt for his life.
- Sword Skills: He did kendo in middle school for a bit, so he has some basics in swordsmanship. After his humiliating defeat at the hands of Julius, Subaru received some rough sword training, under Wilhelm van Astrea at the Karsten mansion, Subaru unlocked a basic grasp on swordsmanship that was helped by the kendo he did when he was younger. However, it should be mentioned that despite the combative skills Subaru picked up from his time in Japan as well as his time in the other world, he was still a low-level combatant overall who would lose to almost every opponent he faced in terms of battle power as he's completely talentless with a blade and is unable to hold his own against anyone who's at least fairly skilled with a sword.
- Subaru personally mentions that he is able to bench 80kg (176 lbs). Before being teleported into the new world, he maintained a fitness regimen of one hundred push-ups, sit-ups, and squats a day, allowing him extremely above average physical ability, especially for a hikikomori whose diet consisted of mostly convenience store items.
Parkour and Survival Skills: During the following year after the incident at the Sanctuary, Subaru learned the basics of parkour from Clind and began training himself. The butler also provided Subaru with essential survival skills, which came in handy to Subaru in the start of Arc 7.
Deductive Ability: Arguably Subaru's greatest asset, aside from Return by Death, is his own mind. Though he wasn't blessed with particularly noteworthy intelligence, he has always had great deductive ability, something he prides himself on. This works well with his time-looping, as the information it provides would be useless if he wasn't able to think and act on it to find the optimal course of action. Both Garfiel and Reinhard have complemented Subaru's strategic ability.
Dragon's Blood: After his fight with the Sin Archbishop of Lust and getting infected by her so-called Dragon's Blood, Subaru's entire right arm has been covered in thick and pulsating black veins. During the 5th Arc, it was this liquid that miraculously healed his shredded right leg, after his initial fight with the Sin Archbishop of Greed. Roughly three months later, during the events of Arc 7, Subaru lost his right wrist against a giant Demon Beast snake. Immediately after falling unconscious, Dragon's Blood miraculously healed it, forming an entirely new and fully functioning arm, covered in thick black and pulsating "skin". It was noted by Subaru that the new skin was rubbery to the touch and not as sensitive to the touch as the other parts of his body. The pseudo-skin was also easily peeled off, revealing fresh skin underneath.
Mind Control: For partaking in the Trial of the Sanctuary, Subaru was given the mark of the Witch of Greed Echidna that indicated him as an Apostle of Greed. Because of this title, Subaru was capable of commanding the many replicas of Ryuzu Meyer created by Echidna centuries ago. The replicas were compelled to follow any order they were given, regardless of their own thoughts on the matter. This gift from Echidna essentially bequeathed Subaru with a small army for a time, however, the Witch of Greed eventually took away Natsuki's title, meaning he became unable to command Ryuzu's replicas once again.
- Guiltywhip: Subaru uses a whip as his main weapon. Like his parkour, Subaru learned the basics of using it from Clind. In the Light Novel, it was revealed that his preferred whip was made of the Demon Beast they fought in Arc 4, the Jet Black King of the Forest Guiltylowe. He named said whip the Guiltywhip.
- Crested Vollachian Knife: Upon encountering the Masked Man in his second loop of Arc 7, Subaru was given a small but very well-made knife. The blade itself was surprisingly sharp and noted by Subaru to be very hard to chip or damage. It's crested with the national symbol of the Empire of Vollachia; a head of a wolf with its head pierced by a sword. According to Todd, it's a gift bestowed directly from the Emperor, making it an extremely prized piece of weaponry.
Lack of Physical Power: Subaru's most obvious weakness is his overall lack in physical power. While definitely more fit than the average person, due to him working out daily, he is without a doubt one of the weakest characters in the series. Though his weakness can partly be attributed to never having been properly trained, as stated by Wilhelm, he doesn't have any talent for battle in the first place and will thus likely never be able to reach the level of some other characters. During his training with Clind, Subaru was instructed to run away as fast as he can, if he has no backup from his friend and his opponent possesses a weapon and at least a decent amount of skill with it.
Lack of Magical Power: While Subaru possessed the rare Yin Magic attribute and was able to quickly pick up how to use it, his lack of training until after he was transported to the Dragon Kingdom of Lugnica meant that the only spell he could use was a basic Shamak. After the events in Sanctuary, Subaru actually became even weaker in this aspect as he collapsed his Gate and is now completely reliant on Beatrice for his spell casting, no longer being able to use any magic on his own at all.
Defective Gate: After the events of the Sanctuary, Subaru completely ruined his Gate due to over-stressing it by casting magic while it was still recovering from the Demon Beast incident in Arc 2. Now he can no longer use magic on his own at all because he cannot expel the mana, which puts him at risk of dying from Mana Poisoning, a state when too much mana builds up in one's Od due to poor mana circulation. Fortunately, his now permanent contract with Beatrice allows her to absorb the excess mana via physical contact which they do daily. Mana Poisoning, however, does pose a great threat to Subaru if he is separated from Beatrice for longer periods of time.
- According to the author, Subaru's birthday is April 1, and his birth flower is a Gypsophila elegans, or annual baby's breath.
- In astronomy, "Subaru" is the Japanese name for the constellation Pleiades. Of which, seven stars in the constellation are named after the Seven Sisters, the daughters of Atlas and Pleione in classical mythology.
- Due to his name being related to a constellation, Subaru used to have a love and obsession over them, thus having vast knowledge of Earth's stars. It was through this knowledge that he was able to solve of the first trial of Pleiades Watchtower, and deduce the stars the Sin Archbishops were named after corresponded with their abilities (Petelgeuse, "Hand of Orion", Sirius, "Shining", Regulus, "Little King", and Capella, "Little Goat", respectively).
- He's surprisingly talented at sewing. In the later arcs, his skill improves to the point where he can even make stuffed toys.
- He did kendo in middle school for a bit, so he has some basics in swordsmanship.
- Before My Fair Bad Lady, he had cross-dressed once in his old life under the name "Schwarz Natsumi".
- "Schwarz" means "black" in German.
- Like his parents, he has a personal bottle of mayo back home.
- The reason why he tapped Crusch's hand instead of shaking it in episode 27 is because he was shy about shaking a girl's hand.
- From the very moment Subaru was summoned to another world, he subconsciously knew he would never return to Japan.
- Subaru's phone ringtone is "Yoake no Michi" from Dog of Flanders.
- In a Q&A, the author stated the chance of Subaru not dying in an arc is 0.
- Even before meeting Emilia, he preferred girls with silver hair.
- He has a personal ranking of his friends and he would use Return By Death if one of them died.
- According to the author, the reason he made Arc 3 was for Subaru to say two lines. The first one being "I hate myself" and the second one being "I love you" (to Emilia).
- In Arc 6, Subaru is revealed to regularly partake self-harm, scratching his arms until he bleeds, biting his lips, et cetera.
- Shamak was in fact more useful to Subaru than Invisible Providence is, according to the author himself.
- Following the incident involving Rem, Greed and Gluttony, Subaru visited Rem daily, discussing his day with the sleeping girl, without fail.
- Many of the Sin Archbishops such as Petelgeuse seemed to suspect that Subaru is the Sin Archbishop of Pride, with both Petelgeuse and Louis claiming that the vacant seat belonged to Subaru, however, it is currently unknown if this is true or just deluded gibberish from the Sin Archbishops.