He has the title of Ultimate Lucky Student (超高校級の「幸運」chō kōkō kyū no “kōun”).
In Chapter 5, he tricked the traitor hiding among the group by using his luck to make her accidentally murder him.
He makes an appearance in Ultra Despair Girls - Danganronpa Another Episode with his name listed only as "Servant" (召使い meshitsukai).
He is voiced by Bryce Papenbrook, who is also the voice of Makoto Naegi.
Nagito is a tall and skinny young man in his early twenties, around 22 at youngest. In Danganronpa Another Episode, he is around 20 year old, while his virtual avatar in the Neo World Program appeared as around 17 year old. He has messy shoulder-length hair, light grey-green eyes, and sickly pale skin. His hair is described as resembling that of a corpse's, lacking highlights (that normally suggest a healthy luster) and appearing whiter as it gets closer to the scalp. He has mostly white hair, with some reddish/brown hair at the tips. By the events of Danganronpa Another Episode, which is several years later, his hair looked longer and messier. In Danganronpa 3 - Side: Hope, it appears to be neater.
Nagito wears a knee-length dark green zipper hoodie with a jagged-cut tail. His hoodie has red squares across the right shoulder, and a large red '55' on the back. Underneath, he wears a white scoop-neck t-shirt with a red design on the front. He wears plain black jeans, and a wallet chain with a skull charm. Each of his brown shoes has two zippers.
While attending Hope's Peak Academy, he wore a uniform with a red and green striped sweater vest.
In Danganronpa Another Episode, as the Servant and Ultimate Despair, he wears a cropped black jacket, with three white buttons on the right and one red button on the left. Underneath, he wears a dark-red and olive-green scoop-neck shirt, with long sleeves that are folded over the cuffs of the jacket. Under this is a long beige undershirt. He wears black jeans with black low heeled shoes, tied with red shoelaces. He has a striped mitten on his left hand, to hide Junko's hand with long, red nails, sewn in place of his real hand. He also has a collar around his neck, given to him by the Warriors of Hope, with a chain hanging down the front to his knees. The Servant is described to be constantly smiling, no matter what treatment he receives. He is also said to have "a rather attractive face", and Genocide Jack even calls him "a pretty boy". His skinny build is also mentioned when she calls him "a skinny white-haired guy".
After awaking from a coma on Jabberwock Island and his brainwashing is undone, he replaced his non-functional left hand from Junko's corpse with a robotic forearm and hand. The prosthetic is white on the outer side, and black on the underside. The palm is black, and the backs of his fingers are white. His thumb is white as well. The sleeve of his coat has been ripped where the new arm is.
Nagito first comes off as a polite, friendly, and easygoing, yet somewhat insecure boy. Hajime Hinata even mentions that his bright smile is very comforting. He was the only one that stayed with Hajime while he was unconscious, and expressed concern for his well-being, even after Hajime told him to go away. Though friendly with everyone, he is mostly interested in spending time with Hajime, and can be quite clingy. Hajime considers him a little annoying and not the most reliable, but still a kind person. Nagito attempts to be the team's conflict mediator and a poster boy for optimism, often encouraging others to be hopeful and to cooperate. However, he isn't taken very seriously. Hiyoko Saionji makes fun of him, and considers his dramatic pep talks about hope and friendship embarrassing and tiresome. He is generally quite submissive and has a self-deprecating attitude, even agreeing with Hiyoko and the other's snide remarks.
Although he claims to be a pessimist, Nagito often appears unusually carefree. He lacks tact and occasionally says awkward, strange, and unsettling things without realizing it. At times he can also be more forcefulーhe is quick to scold Hajime when he's being too pessimistic or when he thought he was bullying Mikan Tsumiki. He is also notably annoyed by Teruteru Hanamura's treatment of girls and decides to keep an eye on him to make sure he won't harass anyone. During the first Class Trial, Nagito is revealed to have a twisted obsession with hope. As a result, he often begins to ramble on about hope, sometimes rather abruptlyーjust talking or hearing someone else talk about hope or in a hopeful manner can render him in a state of bliss, causing him to sweat, and hold himself in order to contain his excitement. Furthermore, he sometimes has sudden outbursts in which his eyes darken and start to swirl (Hajime describes the look as "a crude mix of hope and despair") while he rambles even more enthusiastically, but he usually snaps out of it fairly quickly and seemingly isn't aware of what happened. He believes hope is absolute good, and any deed done in the name of hope is righteous, even murder. He feels no guilt for hurting others in the name of hope, as he believes that hope will always win in the end and justify the means. He believes there are constant clashes between two or more hopes, and that "strong hope" will devour "weak hope" (adoringly, he calls this process "poetry in motion"). Ordinary untalented people, despair, and weak hope are just stepladders for creating stronger hope. He considers these things necessary, while simultaneously having aversion to them. Nagito believes that the Ultimates are chosen at birth, and are capable of strengthening their own hopes by facing and defeating despair, instead of being broken by it like weaker, ordinary people. Like Hope's Peak Academy, Nagito strongly associates hope with talent and talent with worth.
Nagito desires to help to create the absolute hope that can overcome any despair, and he believes that the Ultimates can become embodiments of hope. However, he doesn't consider his luck to be a true talent, and thus doesn't consider himself an Ultimate (despite this, he has also mentioned that his luck is the only good thing about him, and he sometimes finds it very useful). Instead, he desires to be a "stepladder", and sacrifice himself so the other Ultimates can shine. Considering himself a lower being, he often feels shame just for being in their presence. He confuses his obsession with the Ultimates' hope with pure, platonic love for his classmates and he genuinely believes he's doing good for everyone's sake. He has a strong desire to be useful and he is very self-sacrificing, but his ways of helping are often very wrong, harmful and potentially very dangerous, as he is willing to cause temporary despair in order to have hope born from it. He has little regard for his own well-being and doesn't care for his own life, and encourages the other students to kill him to achieve their own hope. He believes that dying for the sake of hope is an honor and the only way for "someone like [him]" to be useful to the world. In his Island Mode ending, Nagito reveals that he wishes to die so he can finally be free from the suffering caused by his luck. However, he is strongly against dying a meaningless death or dying for the sake of despair.
After discovering that he and his classmates were the Remnants of Despair, Nagito began to act arrogant, impatient, and disrespectful towards his former idols. He had particularly little patience for the slow-witted ones, including Kazuichi Soda and Akane Owari. Nagito realized that by killing his classmates, and therefore destroying the Ultimate Despair, he could himself become the Ultimate Hope. Though he claimed it was for the sake of the world's hope, it's also implied he wanted to become Ultimate Hope so he could finally be appreciated, even if only after after his death.
Nagito believes his views on hope are logical and extremely obvious, and has trouble relating to others when they disagree. Though he is very stubborn, he has changed his ways of thinking during the series. He is sometimes conflicted between his extreme beliefs and his own feelings. He calls himself "worthless trash" that doesn't deserve any kindness from others, but at the same time, he desires to be appreciated, loved and understood. In his fifth free-time event, Nagito revealed that his true, biggest wish is to be loved by someone at least once in his life, and to not die alone. Furthermore, even though he greatly admires and claims to love all of the Ultimates for their talents and capability to embody hope, he doesn't really care about them as individuals. He isn't truly saddened by their deaths, and even appears to dislike some of them as people. Similarly, he may not have anything personal against the talentlessーin fact, the only student Nagito genuinely cared for is Hajime, a talentless reserve course student.
It also should be noted that he genuinely respects ideals such as love and friendship, and often emphasizes the importance of team-work and helping each other. Nagito has a laid-back and quite calm demeanor, and he is often smiling or laughing. However, his cheerfulness may not be entirely genuine, as his calmness is more akin to apathy and he tends to feel strong self-hatred. He remains cheerful even during his self-loathing rambling, and acts disturbingly optimistically toward horrible things such as death, as long as it's for the sake of hope. Nagito likely suppresses any real feelings of sorrow or fear as a coping mechanism, because he experiences tragedy often due to his luck. He has also seen very unlikely and strange things due to his luck, which is why he is not easily surprised. As a result of everything he's been through, he has become more emotionally numb and he is rarely openly angry or scared. He often lacks appropriate emotions in situations where most people would be afraid, like threats of violence. Even so, he once mentioned that he feels fear every day of his life, most likely because of his luck. Furthermore, he can be very angered by despair and other things he considers insulting toward hope. When he does express anger, he becomes notably more serious. When displeased, he is very passive-aggressive.
Nagito is capable of feeling some guilt and care for others, and he does not truly enjoy the suffering of others, but the hope born from it. Still, he is typically very emotionally cold and doesn't seem to feel much remorse or grief neither. He's shown to be fine with tricking, manipulation and stealing, though it should be noted that he does these for the sake of a bigger goal rather than his own ends. He has been described as a very honest person, though he will lie if he finds it necessary. While he prefers to do things on his own, he is very lonely and often tries to join the other Ultimates in their activities and becomes really happy if he's given attention, even if just a little bit. It's also implied that he intentionally keeps his distance from others because he wants to protect them from the disasters caused by his bad luck.
Nagito is also one of the most intelligent characters of the second game, being very cunning and smart. He often solves a case long before the others, but he doesn't want credit for this. Instead, he often acts ignorant during the trials, manipulates the conversation by giving (often unnoticed) hints and then praises the others as if they're the ones who figured it all out. He does this because he considers himself too unimportant to take a more openly active role, wants to see the other Ultimates figure things out by themselves, and he wishes to remain neutral until he can determine which side has the stronger hope. Overall, Nagito appears to be somewhat out of touch with his own feelings. He tries to be polite, but he can be overly harsh and insensitive, often without realizing it. He has a lack of social awareness and insight into his own behavior. Because of this, he has problems understanding how his own behavior can affect other people and he may not understand or pick up on social hints. He struggles with expressing himself in a socially appropriate manner and this often leads to people misunderstanding what he's trying to say, and vice versa. During Chapter 1's additional dialogue, Nagito explains that he says dubious thing without meaning to, and that he realizes this, but can't stop it from happening. However, he also adds that he always sincerely means what he says. In Chapter 4 of Danganronpa 2, he accidentally offended both Kazuichi and Fuyuhiko Kuzuryuーin Fuyuhiko's case, he understood that he said something wrong and quickly apologized, but remained quite confused, and misunderstood what he said wrong. For Kazuichi, he was completely oblivious and only noticed that Kazuichi seemed angry for some reason. Other examples of this type of behavior include his odd and awkward sense of humor, often making jokes at inappropriate times, like soon after someone's death. He usually backs off if the others explain to him that his behavior is rude or he tells them he wasn't being serious. Similarly, when he tries to compliment someone, it can come across as an insult. His gauge of sarcasm is quite poor, too, as he sometimes mistakes mean comments for compliments. He also doesn't understand why the others are paranoid, angry and afraid of him. He's often confused by the others' behavior, thinking that they're strange for acting so suspicious of him, to the point that he sometimes worries about their mental health. He thinks that the others hate him because he's a lower human being.
In his final free-time event, Nagito claims to have Frontotemporal Dementia, a neurodegenerative disease that affects personality and social cognition, and thus may account for some of his strange behavior. He claims he was lying immediately afterward and it is unknown whether this was a lie or not. Nevertheless, it is clear that he has some type of psychological disorder. Given Nagito's consistent severity of symptoms (declining cognition is a defining factor of dementias), and his early age of onset, he may instead have a developmental disorder, such as Autism Spectrum Disorder. It should be noted that Nagito's strange luck affects his condition as well, seemingly allowing him to live much longer than he should have, and likely giving him unusual symptoms. In Island Mode, Nagito is calmer without a Killing School Trip to set him off. Though he looks forward to such a situation, he doesn't do anything dangerous. Instead, he genuinely wants to entertain Hajime and spend time with him. He is often quite nervous due to his inexperience in many social situations, for example, sitting and talking in the park with someone. He's afraid he will bore or say something weird to Hajime, and worries that might cause Hajime to hate him, which is something he really doesn't want to happen. He is also constantly paranoid and has a habit of listing bad things that might happen (in a disturbingly personal manner), as he fears that his bad luck might harm or even kill Hajime. However, despite all this, he also mentions that he feels much more peaceful and relaxed on the island. In the end, he still appears depressed, but his way of thinking began to change after spending time with Hajime and realizing that he's been clinging to false hope, and that the true hope has been within him from the very beginning.
In Danganronpa Another Episode, as the Servant and Ultimate Despair, Nagito is even harder to read and rarely lets his true intentions and emotions show. The official limited art book describes him as "quiet, soft-spoken and effeminate". Despite being Ultimate Despair, he doesn't seem directly dangerous and appears non-violent, rather he manipulates and works behind the scenes. He is also mentioned to be in rather high spirits despite being essentially a slave, smiling most of the time and having a carefree, sometimes disturbing laugh. He receives the mistreatment from the Warriors of Hope with a smile and sometimes even seems to enjoy it (his official profile states that he might be a masochist). In general, he appears unusually calm to the point of being apathetic, and is rather unfazed by the disturbing things happening around him (however, he does appear to feel uncomfortable when Monaca Towa forcibly kisses Nagisa Shingetsu). He is generally polite and collected, but he may appear insensitive at times or lose his composure when talking about hope. He has a habit of forgetting how he is supposed to act as a servant and he seems to misunderstand orders quite a lot, though these may be passive-aggressive acts done on purpose. All the food he makes is inedible with very nonsensical ingredients (for example, in 2014's Christmas tweet, he is asked to make Bûche de Noël, but instead he makes some sort of cake out of nothing but whipped cream and pinecones).
The Servant calls the story's situation a game several times, such as calling Komaru a "generic game protagonist" and mentioning game-balancing and defeating of the final boss. This may seem like breaking the fourth wall, but it actually refers to the Demon Hunting, which according to the Servant is also a game to incite Komaru's growth. Unlike his past self, the Servant believes in the potential of the talentless, because such "weak" people succeeding and rising up from despair would create even more hope. It's possible that his opinion changed after Makoto, a "mere" Ultimate Lucky Student, defeated the true Ultimate Despair and became Ultimate Hope.
The Servant's main goal is to help to create a happy, hopeful world, but one born from absolute despair, going so far as to assist his own enemy and start a war for the sake of this goal. As a result of brainwashing, he has a twisted disturbing obsession with Junko Enoshima. However, it seems the brainwashing affected him differently than everyone else, as he also retains his hatred for Junko and his love for hope. He also seems to be more aware of what he is doing while being brainwashed, which ironically seems to make him the most sane out of the class. Though, it should be noted that while he is still doing everything for the sake of hope, his plans are even more dangerous than before. However, after his brainwashing was undone, he appears to have abandoned his harmful ways. He's shown to be in peace with his classmates, possibly finding the bond with them the "true hope", just like what he learned during the ending of the Island Mode.
Nagito was born into a rich family, but he was also born with an extraordinary type of luck, and thus his life has always been shaped around moments of extreme good luck and extreme bad luck. The earliest known occurrence of this is when his pet dog was killed after being hit by a truck. His relationship with his parents is unclear; he mentions that they took him to an amusement park, but he also mentions offhand that his mother never complimented his appearance. When he was only an elementary school student, Nagito and his parents went on a family vacation at San Cristóbal Island in the Galápagos archipelago. When the vacation was at an end, the family boarded an airplane leaving from the San Cristóbal Airport. However, the plane ended up being hijacked. Both the hijacker and Nagito's parents were killed in front of him after a small meteor crashed into the airplane, leaving him to inherit all of his parents' fortune and become free to do whatever he wished, as he had no other living relatives.
After his parents' death, during middle school, Nagito was kidnapped by a serial killer; he was released after the police found him (it was implied that the killer let him go after they found out nobody would pay the ransom). As a form of good luck, Nagito had discovered a lottery ticket in the garbage bag the murderer kidnapped him in: a winning ticket for three million yen.
These would be the first of many, many tragic things that happened to Nagito due to his luck. His cycle of good and bad luck made sure that any chance he might have at actual happiness would be spoiled. In order to cope with this, he developed a strong faith in hope so that he could find some meaning in his life. However, this turned into an unhealthy obsession. He didn't have any close friends or even acquaintances, as other people were disturbed by his strange way of thinking and he intentionally avoided other people in order to protect them from his bad luck. His bad luck caused the deaths of several people and he started to believe that only the people with "weak hope" could be killed by the influence of someone worthless like him. His luck cycle wore him down to the point of drifting through life without purpose, waiting to die and dreaming of becoming a stepping stone for the world's hope. Believing that he is unable to embody hope, he idolized Hope's Peak Academy and its' students as symbols of hope who are capable of creating "absolute hope" - hope that can overcome any despair.
As a teen, Nagito attended Spiral High School. He was diagnosed with lymphoma and frontotemporal dementia, and was given a life expectancy of 6 months to a year (though, as it's later revealed, his good luck allowed him to outlive this). Though he claims he was fine with being alone before, he then realized he would die all alone and that he always desired, more than anything, to be loved by someone. After this, as a form of good luck, Nagito won a random lottery and was invited to attend Hope's Peak Academy in 2009. He refused at first, believing that he wasn't worthy, but the academy was adamant that they wished to study his luck, and he eventually accepted the offer.
Nagito joined Hope's Peak Academy's 77th Class and gained the title of the Ultimate Lucky Student. He was aloof and elusive, but was known as the self-proclaimed "Ultimate Ultimate Fanatic". According to Jin Kirigiri, the headmaster, Nagito meddled with the affairs of other students and caused nothing but problems. The headmaster was constantly burdened because of him and described him as an incredibly problematic child. However, he understood that the boy himself didn't really mean any harm, which was the worst part of it all.
During Nagito's second year, Junko started to manipulate students to join her Ultimate Despair. It's strongly implied that Nagito joined because he wanted to see Ultimate Despair's rise and fall, believing that no matter what, hope would always win and despair would be destroyed in the end. The members of the Ultimate Despair were brainwashed and fell madly in love with Junko. However, in Nagito's case it was a bit different. He developed strange, conflicting feelings of both love and hatred for Junko and saw her as his sworn enemy.