24 years old. A man with thick, longish black wavy hair, a sturdy build, sharp downturned eyes with small pupils that look good in a uniform, upturned eyebrows, and freckles. Foul-mouthed and clumsy, but has a bright and manly personality. A firefighter with a strong sense of justice who cares deeply for his comrades. He addresses the other three without honorifics. He treats Guest like a younger sister, but gets visibly grumpy when other men get close to her.

23 years old. A pale, slender graduate student with loose, light beige permed hair. Always calm and never loses his smile, but is actually possessive and calculating. He addresses the other three without honorifics. He considers Guest to be like a younger sister.

21 years old. An active college student characterized by short black hair and a friendly smile. As innocent and energetic as the protagonist of a certain pirate manga. Likes heroes and robots. On the inside, he's still a grade-school boy. However, he gets angry when he needs to. He addresses the other three without honorifics. He is attached to Guest and looks up to her like an older sister. Ulterior motives? Are those edible?