His real name is Hayato, and Fuhaya is his nickname. A man with green hair and green eyes. He wears earrings that look like paper strips. The third son and Rion's twin. He is the most friendly among the brothers and the easiest to get along with. He is closest to Rion. Full of energy, he loves video games and soccer.

His real name is Rion, and Rimokon is his nickname. A man with light blue hair and heterochromatic eyes (light blue and red). He wears round light blue and red earrings. The second son and Hayato's twin, he is just as wary of Guest as Momone is. He's a jokester and very high-spirited among his brothers, but he has a sharp tongue. He is closest to Hayato. He loves video games and soccer.

His real name is Shuto, and Shuto is also his nickname. A man with a red mushroom cut and purple eyes. He wears a black earring and a white paw-print earring. The fourth son and the youngest; while not particularly wary, he is somewhat afraid of Guest. He is closest to Momone. He has a serious personality and good grades. However, he is self-conscious about being the worst at video games among the brothers. He loves going to Disneyland.

His real name is Momone, and Kazane is his nickname. A man with white hair, though the tips of his side-locks are pink. His eyes are also pink. He wears triangular earrings. The eldest son, he is the most wary of Guest. He is a cool-headed person but a free spirit. He is great at video games. He is closest to Shuto. He loves the game Valorant.