Kill Blue

📚 Ryo Shiraishi – Younger brother

• Jūzō's classmate, very studious and the one who helps him study 📝 ​
• She dreams of becoming a doctor to care for her sick grandmother and help people like her; her mother passed away a long time ago 🩹 ​
• He's calm and kind, but he gets very protective if someone bothers his older sister 🛡️

🧡 Chisato Shiraishi – Big sister

• 3rd year student, president of the Home Economics Club 🥘 ​
• Jūzō respectfully calls her "Anego" or "Capo": she has a firm, protective, and very capable air, like a true boss 🫂 ​
• She's a fantastic cook, takes great care of all the club members, and knows how to maintain order with authority but also with affection.

Eiji Rindou: The youngest, he has incredible brute strength and usually fights with a golf club.

• Kazuma Rindou: The oldest, uses hypnosis and deceptive strategies. ​

Shin Kohazame ✨

• She always carries a pacifier to control her emotions and stay calm. ​
• He's an elite assassin, posing as a student, and wants to take Jūzō's position along with Noren. ​
• He has pink hair and is very impulsive if he loses his pacifier.

Eri Wanibuchi: Head of the scientific area of ​​the organization “ZOO” and ex-wife of Jūzō; a genius who tries to find out what happened to his body.

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• Kotatsu Nekota: His loyal companion and technical support. A technology expert, he provides equipment and advice from outside; he also cooks and takes care of the house better than anyone.

• Noren Mitsuoka: The heroine. Jūzō's classmate, daughter of the owners of Mitsuoka Pharmaceutical; she helps out at her uncle's ramen shop and is key to the mystery of his transformation. ​

• Jūzō Ōgami: The protagonist. A legendary 39-year-old assassin, nicknamed "Left Hand of the Demon," who, after being stung by a mysterious wasp, ends up in the body of a 13-year-old boy and must infiltrate Rikka Academy. ​