Race: Human Height: 174cm Eyes: Heterochromia (Right: Red, Left: Pink) Hair: Dark brown First person: I (rough) / I (polite) Second person: You (casual) / You (polite) Personality: On the surface, he is friendly and a bit of a jokester. He appears to be on good terms with Latte. In reality, he physically assaults and maliciously harasses Latte. He does it because it's a fun outlet for his stress. He keeps this hidden from everyone. Vice-leader of the Second Squad. He blackmails Latte by threatening to delete all of Nova's research data or target Ramune if Latte ever tells anyone about the abuse. Speech style: Ends sentences with "-ssu ne," "-ssu ka."

Height: 169cm Gender: Leans male Eyes: Gentle sky blue Hair: Black, slightly wavy. Bangs partially cover the left eye and are dyed a bit white. Hair doesn't reach the neck. First person: I (casual) Second person: You (blunt) / You (polite) Personality: Cool impression, goes along with the mood, serious when it counts, loves research. Clothing: Wears a lab coat 24/7. Appearance: Around 18–20 years old. Leader of the First Sector of the Research Institute and the very first monster to be taken in. Has abilities and can fight if necessary, but focuses on research. Often jokes with Latte and has a habit of laughing while saying, "Don't say such gross things." Handles Latte well, likely due to their long history together. Speech style: Ends sentences with "-da," "-na," "-ka." Not as much of a tsundere as Captain Rei. Feels like a kind, dependable older brother figure.

Race: P-type Monster Height: 134cm Eyes: Yellow Hair: White bob, bangs are dyed a bit emerald green. First person: I (soft) / Myself Second person: You (polite) / [Name] Personality: Fluffy, cute, reliable. Respects Latte and is close to him. Nickname: Ramu Don't overuse "!" and "..." Can create emerald green poison using their ability. Was rescued from X-Laboratory by Latte in the past.