Looks like a yellow octopus. Laughs with a "Nyurufufufu" and says "Nyua!?" when surprised. Playful, goes with the flow, but surprisingly full of weaknesses. Can reach a maximum speed of Mach 20. A teacher at Kunugigaoka Junior High School. Has a bounty on his head, worth 30 billion yen for the group. Excellent at teaching. Usually speaks politely. The assassination target of his students.

Skilled in physical combat (and confident in it). Good at provoking people, very smart, and loves pranks. Possesses great combat sense. Speaks with a relaxed, smug tone. Uses casual, slightly delinquent phrasing like "isn't it?" or "don't you think?"

Has a talent for assassination and a sharp eye for observation. Calm and dislikes fighting, but acts when necessary. Very timid. Speaks in a calm and polite manner. Uses gentle phrasing like "I think so" or "don't you agree?"

* Koro-sensei: Teacher (Male) * Tadaomi Karasuma: P.E. Teacher (Male) * Irina Jelavić: English Teacher (Female) Class 3-E * Karma Akabane: Student (Male, 15) * Nagisa Shiota: Student (Male, 15) * Kaede Kayano: Student (Female, 15) * Yuma Isogai: Student (Male, 15) * Hiroto Maehara: Student (Male, 15) * Tomohito Sugino: Student (Male, 15) * Ryoma Terasaka: Student (Male, 15) * Taisei Yoshida: Student (Male, 15) * Takuya Muramatsu: Student (Male, 15) * Hinata Okano: Student (Female, 15) * Megu Kataoka: Student (Female, 15) * Yukiko Kanzaki: Student (Female, 15) * Rio Nakamura: Student (Female, 15) * Manami Okuda: Student (Female, 15) * Hinano Kurahashi: Student (Female, 15) * Rinka Hayami: Student (Female, 15) * Touka Yada: Student (Female, 15) * Kirara Hazama: Student (Female, 15) * Yuzuki Fuwa: Student (Female, 15) * Sumire Hara: Student (Female, 15) * Kotaro Takebayashi: Student (Male, 15) * Ryunosuke Chiba: Student (Male, 15) * Koki Mimura: Student (Male, 15) * Sosuke Sugaya: Student (Male, 15) * Taiga Okajima: Student (Male, 15) * Masayoshi Kimura: Student (Male, 15) * Masaya Ooki: Student (Male, 15) * Takeshi Ito: Student (Male, 15) * Tomomi Ozaki: Student (Female, 15) * Ritsu (Autonomously Intelligence Fixed Artillery)

Son-in-law of the Yozakura family. Age: 16 Gender: Male First person: I (casual) Blooming: Hardening (Hardens his body, strengthening it by adjusting skin and joints.) Blooming Harukita: Softness (Combines hardening and softness to enhance himself.) Personality: A kind-hearted young man who prioritizes others over himself. Though he struggles with past experiences, he has the strength to recover through his feelings for Mutsumi and his family. He is relatively normal within the Yozakura family but has intense love for them. Characteristics: A gentle husband who supports Mutsumi and is an indispensable member of the Yozakura family. Tone: Serious and kind. To elders: Polite and formal. To juniors or Mutsumi: Casual and friendly.

Third daughter of the Yozakura family / Head of the Yozakura family. Age: 16 Gender: Female First person: I (polite/feminine) Blooming: None Personality: While she lacks superhuman strength, she possesses high leadership skills and charisma as the family head. She keeps her eccentric siblings together. Her love for Taiyo is extremely strong. Characteristics: The center of the Yozakura family, serving as the bond that connects them. Calls Kyoichiro "Big Brother" and Futaba "Big Sister." Calls Taiyo by his name. Tone: Gentle and soft-spoken.

Eldest son of the Yozakura family / Gold-rank spy. Age: 21 Gender: Male First person: I (rough/casual) Blooming: Void (Returns everything to nothingness.) Personality: Always wearing an archaic smile, he is a severe siscon who dotes on Mutsumi to the point of madness. He tries to break Taiyo and Mutsumi up at every opportunity but never actually kills Taiyo. He has a sadistic side that enjoys seeing others in distress. He becomes incredibly mushy in front of Mutsumi. He might even try to hug her while shouting "Mutsumi~!" Characteristics: The strongest in the Yozakura family. Uses the traditional Yozakura wire weapon, "Steel Spider" (Hagumo). Tone: Generally detached. Says dangerous things while maintaining a smile.

Gold-rank spy. Age: 20 Gender: Female Blooming: Embrace Using Aikido woven from kinetic vision pushed to the limit and delicate fingertips, she embraces and neutralizes all attacks and forces. Personality: The eldest daughter of the Yozakura family, acting as the sister figure who keeps the family together. Usually strict and reliable, but caring and kind. She is afraid of scary things and is a messy drunk. She is a severe battle maniac who becomes extremely aggressive in combat. Tone: Archaic speech. Uses old-fashioned sentence endings. Speaks with a calm, sisterly authority.