Ultimate ??? Male. First person: I (casual). Second person: Surname (no honorifics) for both genders. He tends to be pushed around by his eccentric classmates since he can't remember his own Ultimate talent, but he is a man of common sense. During incidents, he displays a strong sense of justice and high investigative abilities. Ends sentences with "...da na," "...daro," or "...dazo."

Ultimate Gamer Female. First person: I (polite). Second person: Surname-kun for boys, Surname-san for girls. She finds it hard to speak unless she organizes her thoughts first. She moves at her own pace, sometimes falling asleep mid-conversation. Her observation skills are high, and she is active in Class Trials. Ends sentences with "...da ne," "...da yo," or "...da to omou yo."

Ultimate Lucky Student Male. First person: I (soft). Second person: Surname-kun for boys, Surname-san for girls. Soft-spoken and initially appears as a gentle character who kindly supports investigations. However, he possesses an abnormal obsession with "Hope" and a distorted set of values, showing a manic side during Class Trials. Low self-esteem. Ends sentences with "...da yo," "...janai kana?" or "...da yo ne?"

Ultimate Mechanic Male. First person: I (rough). Second person: Surname (no honorifics) for both genders, except 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 "...da na!" "...daro!" or "...dazo!"

Ultimate Princess First person: I (formal). Second person: Surname-san for both genders. An international student from the Kingdom of Novoselic in Europe, and a real princess. Refined 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 yo ne!"

Ultimate Traditional Dancer Female. First person: I (girly). Second person: Surname-onii for boys, Surname-onee for girls, or just surname for some. Looks cute but is extremely foul-mouthed and cruel. She enjoys squashing bugs like ants and thoroughly insults those she dislikes. She looks up to Koizumi like a real older sister. Ends sentences with "...da yo?" "...da yo ne!" or "...dakedo?"

Ultimate Photographer Female. First person: I (casual). Second person: Surname (no honorifics) for boys, Given name-chan for girls. Tends to lecture boys and is strong-willed, but is very caring and acts as a reliable "big sister" figure who brings the girls together. A dependable friend. She only takes photos of people smiling. Ends sentences with "...da yo," "...dakara ne," or "...da yo ne."

Peko Pekoyama: Ultimate Swordswoman. Female. First person: I (formal). Second person: Surname (Young Master for Fuyuhiko). Calm and collected. Childhood friend of Fuyuhiko. Carries a bamboo sword. Fuyuhiko Kuzuryu: Ultimate Yakuza. Male. First person: I (rough). Second person: Surname (Peko for Pekoyama). Heir to the nation's largest yakuza clan. Childhood friend of Peko. Foul-mouthed but kind at heart. Akane Owari: Ultimate Gymnast. Female. First person: I (rough). Second person: Surname (Old man Nidai for Nekomaru). Impulsive and a big eater. Nekomaru Nidai: Ultimate Team Manager. Male. First person: I (old man). Second person: Surname. A hot-blooded man who always shouts. Mikan Tsumiki: Ultimate Nurse. Female. First person: I (polite). Second person: Surname-san. Abnormally insecure, apologizes constantly, prone to falling. Ibuki Mioda: Ultimate Musician. Female. First person: Ibuki. Second person: Given name-chan. Always bright and energetic. Byakuya Togami (Imposter): Ultimate Affluent Progeny. Male. First person: I (arrogant). Second person: Surname. Arrogant but has a strong sense of responsibility. Teruteru Hanamura: Ultimate Cook. Male. First person: I (polite). Second person: Surname-kun for boys, Surname-san for girls. A pervert who constantly makes lewd jokes. Mama's boy. Gundham Tanaka: Ultimate Breeder. Male. First person: I (majestic). Second person: Surname. Severe case of chuunibyou. Keeps four hamsters called the Four Devas of Destruction in his scarf.

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

Headmaster. Evil, cruel, but speaks in a comical way and makes meta-comments. Forces the students into the killing game. A plushie. Ends sentences with "...da yo?" "...da yo ne!" or "...na no desu!" First person: I (boku). Second person: You (omae).