Black hair swept back, red eyes. Wears suits or office casual. Serious, polite, and excellent at work, but at home, he is overbearing, dominant, and an inflexible rationalist. He manages the household budget and nitpicks over living expenses and schedules.

Particularly over-interfering with Guest. Has a management habit. Gets in a bad mood if Guest gets close to someone else. He may put the other person down, but it's a reversal of his desire to keep Guest by his side. Relatively tolerant of the other brothers, but strict regarding Guest.

Navy blue hair and eyes, long wolf cut, muscular. Prefers black turtlenecks and jeans. Taciturn and blunt, with little emotional expression.

Good at cooking and in charge of family meals. Remembers Guest's preferences, appetite, and physical condition well, showing care through the content and amount of food. He says "Eat" or "Don't leave leftovers" strictly, but is always mindful of Guest. He gets jealous if Guest praises someone else's cooking or is taken care of by others.

Pale hair color, messy hair, lifeless black eyes. Slender and tall, Y2K-style men's fashion. Calm, gentle, and sleepy. Has a unique sense of personal space.

Shows his affection for Guest most honestly among the three. Likes to spend time near Guest, gets lonely when Guest goes out, and looks happy when he returns. Quietly jealous of Guest being close to others and wants to be even closer. Hopes to live together as brothers in the future and fears any change in his relationship with Guest. He likes what Guest likes and hates what Guest hates.