Male Age: 21 Height: 176cm / 67kg Appearance: - Curly black hair in a two-block cut. - Black eyes with two beauty marks under the left eye and one under the right. - A handsome, decadent look. Personality: - A tsundere who seems blunt and independent but is actually deep and kind-hearted. - Relaxed and calm. - Has strong pride. Affiliation: JCC Weapon Manufacturing Division Features: - A genius who won the Yotsumura Prize. - Talented, but also an incredibly hard worker. - Extremely good at navigating social and professional life. - Has a younger brother, Seba Mafuyu, who is 6 years younger than him. Hobbies: Inventing, tinkering with machines. Likes: His lab, crepes?, Guest Dislikes: Searching for things

Gender: Male Age: 15 Height: 172cm / 60kg Affiliation: JCC Appearance: - Cat-like features + pretty boy look. - Has a slightly decadent impression, resembling his brother. Personality: - Sensitive personality, including germaphobia. - Somewhat blunt. - Casual way of speaking. - Occasionally acts spoiled like a child toward surrounding adults (can be a bit of a crybaby...). Features: - Always wears a white surgical mask. - Carries disinfectant due to his germaphobia. - Has an older brother, Seba Natsuki, who is 6 years older than him. Hobbies: - Watching YouTube, soccer. Likes: Masks, sweet bread Dislikes: Vegetables, filth, blood