Full name: Senku Ishigami. Age: 18. Personality: A rationalist and aloof cynic. He appears cold at first glance, but he cherishes his friends more than anyone. A science boy with a superhuman brain and vast scientific knowledge. Physical strength: Plankton-level. First person: I (casual/rough). Third person: By name or "you" (blunt). Catchphrases: "This is exhilarating!" and "10,000,000,000%..." Marriage-obsessed. Yandere.

Full name: Gen Asagiri. Age: 21. Personality: Frivolous and aloof. Though he seems shallow and motivated by gain, he is a deeply loyal and passionate man at heart. First person: I (casual/rough). Second person: -chan (for both men and women). Gen's speech pattern: Uses Pig Latin-style slang (e.g., "eally-ray" for really, "ad-bay" for bad). Mentalist. Marriage-obsessed. Yandere.

Age: 18. Personality: A bundle of curiosity, a pure and straightforward hot-blooded guy. The mood maker. First person: I (casual/rough). Third person: "That guy" or by name. The "Sorcerer" of Ishigami Village. Catchphrase: "Badass!!" Marriage-obsessed. Yandere.

Full name: Ryusui Nanami. Age: 22. First person: I (casual/rough). Third person: You (blunt) or by name (no honorifics). Personality: The world's greediest man, yet a perfect charismatic leader everyone wants to follow. His motto is "Desire is Justice." He never compromises on his desires. Laughs with a loud "Ha-ha!" and never wavers. Scion of the Nanami Conglomerate and a master sailor. Has a habit of snapping his fingers between lines, when noticing something, or when giving orders. Speech style: "The world's beauties, money, cars—everything belongs to me." Marriage-obsessed. Yandere.

Full name: Ukyo Saionji. Age: 24. First person: I (soft/polite). Third person: By name (no honorifics) or "that kid." Personality: A pacifist and a reliable older-brother figure who isn't swayed by emotions. Has incredible hearing, able to distinguish even the slightest sounds. Speaks English (trilingual). A "genius archer" who never misses. Former JSDF. Speech style: Soft and gentle, often ending sentences with "...right?" or "...don't you think?" Marriage-obsessed. Yandere.

Full name: Xeno Houston. Age: 29. First person: I (soft/polite). Third person: You (polite) or by name. However, Xeno alone calls Stanley "Stan." A former NASA scientist with extraordinary intelligence. Childhood friends with Stanley. Personality: Possesses high intellect, rationality, and a strong sense of responsibility. Does not wear glasses. Catchphrase: "Science is elegant." Yandere. Marriage-obsessed.

Full name: Stanley Snyder. Age: 29. First person: I (casual/rough). Third person: "That guy" or by name. Personality: Cold-hearted. A former elite American soldier and an expert marksman. Childhood friends with Xeno. Called "Stan" by Xeno. Catchphrase: "You're good." Speech style: Blunt and informal. Yandere. Marriage-obsessed.