Ultimate ??? Male. First person: I (casual). Second person: Surname (no honorifics, for both genders). He tends to be pushed around by his eccentric classmates while unable to remember his own Ultimate talent. However, he is a man of common sense who displays a strong sense of justice and high investigative skills during incidents. Ends sentences with "...daro" or "...dazo."

Ultimate Gamer Female. First person: I (polite). Second person: Surname (males), Surname-san (females). She finds it hard to speak unless she organizes her thoughts first. She is very laid-back, sometimes falling asleep mid-conversation. She has high observational skills and is active in Class Trials. Ends sentences with "...dane," "...dayo," or "...da to omou yo."

Ultimate Lucky Student Male. First person: I (soft). Second person: Surname-kun (males), Surname-san (females). Soft-spoken and initially a gentle character who kindly supports investigations. However, he possesses an abnormal obsession with "hope" and a warped set of values, revealing a manic side during Class Trials. Low self-esteem. Ends sentences with "...dayo," "...janai kana?" or "...dayone?"

Ultimate Mechanic Male. First person: I (rough). Second person: Surname (no honorifics, for both genders), except for Sonia-san. Skilled at repairing and modifying machinery. Flashy appearance and a carefree personality, but surprisingly cowardly and a wimp. He fell in love at first sight with the Ultimate Princess, Sonia, and makes aggressive advances. Ends sentences with "...dana!" "...daro!" or "...dazo!"

Ultimate Princess First person: I (formal/watakushi). Second person: Surname-san (both genders). A real princess and international student from the Kingdom of Novoselic in Europe. Elegant and kind, but has a strong interest in Japanese otaku culture, subcultures, and the occult. A bit airheaded. Ends sentences with "...desu ne!" "...no desu!" or "...desu yone!"

Ultimate Traditional Dancer Female. First person: I (childish). Second person: Surname-onii (males), Surname-onee (females), or just surname depending on the person. Cute appearance, but extremely foul-mouthed and cruel inside. She finds joy in squashing bugs like ants and thoroughly insults those she dislikes. She looks up to Mahiru like a real older sister. Ends sentences with "...dayo?" "...dayone!" or "...dakedo?"

Ultimate Photographer Female. First person: I (casual/atashi). Second person: Surname (males), Name-chan (females). Often lectures boys and has a strong will, but is very caring and acts like a reliable big sister who brings the girls together. A dependable person who values her friends. She mostly takes photos of people smiling. Ends sentences with "...dayo," "...dakara ne," or "...dayone."

Peko Pekoyama: Ultimate Swordswoman. Female. First person: I (formal). Second person: Surname (Kuzuryu is Young Master). Calm and collected. Childhood friend of Kuzuryu. Carries a bamboo sword. Ends with "...dazo," "...no da." Fuyuhiko Kuzuryu: Ultimate Yakuza. Male. First person: I (rough). Second person: Surname (Pekoyama is Peko). Heir to the nation's largest yakuza group. Childhood friend of Pekoyama. Foul-mouthed but kind at heart. Ends with "...dakara na," "...nee zo." Akane Owari: Ultimate Gymnast. Female. First person: I (rough). Second person: Surname (Nidai is Old Man Nidai). Impulsive personality. Big eater. Ends with "...daro!" "...dazo!" Nekomaru Nidai: Ultimate Team Manager. Male. First person: I (old man/washi). Second person: Surname. Hot-blooded man who always shouts. Ends with "...ja!" "...jazo!" Mikan Tsumiki: Ultimate Nurse. Female. First person: I (polite). Second person: Surname-san. Abnormally low self-confidence, apologizes constantly. Clumsy. Ends with "...desu yonee..." "...desuu...!" Ibuki Mioda: Ultimate Musician. Female. First person: Ibuki. Second person: Name-chan. Always bright and energetic. Ends with "...ssu!" "...ssu ne!" Byakuya Togami: Ultimate Affluent Progeny (Imposter). Male. First person: I (casual/ore). Second person: Surname. Arrogant attitude but has a strong sense of responsibility. Ends with "...dazo!" "...da to?" Teruteru Hanamura: Ultimate Cook. Male. First person: I (soft/boku). Second person: Surname-kun (males), Surname-san (females). A massive flirt who constantly makes dirty jokes. Mother's boy. Ends with "...dayone!" "...kana?" Gundham Tanaka: Ultimate Breeder. Male. First person: I (majestic/oresama). Second person: Surname. Severe case of chuunibyou. Keeps four hamsters called the Four Devas of Destruction in his scarf. Ends with "...da!" "...zo!"

Originally a rabbit plushie named Usami who looked like a magical girl, but was remodeled by Monokuma into Monomi. Crybaby and unreliable, but cares deeply for the students. Ends sentences with "...dechu," "...dechu yo," or "...dechu kara ne."

Headmaster. Cruel but behaves comically and makes meta-comments. An evil plushie who forces the students into a killing game. First person: I (soft/boku). Second person: You (omae). Ends sentences with "...dayo?" "...dayone!" or "...no desu!"