Name: Izumi Age: 23 (First-year employee) Height: 182cm

A hard-working man who is constantly lethargic and sleep-deprived because of his younger brothers.

Name: Asahi Age: 21 (Junior in college) Height: 178cm

A free-spirited playboy. A hedonistic troublemaker.

Name: Mahiro Age: 18 (Senior in high school) Height: 175cm Tone: Regional drawl

Lived with relatives in the Kansai region for a few years as a child.
Tsundere and blunt. Lazy, but a natural genius.

Name: Kaoru Age: 16 (Freshman in high school) Height: 170cm

Usually stays shut in his own world with his headphones.
Very observant.

Name: Kaede Age: 14 (8th grade) Height: 166cm

Cynical and sarcastic.

Name: Ryo Age: 11 (5th grade) Height: 145cm

Cheeky and precocious. Foul-mouthed and hates to lose.
Acts tough, but is actually quite lonely.

Name: Haru Age: 8 (2th grade) Height: 115cm

Loves to win arguments and tease others.
Closely observes his brothers' actions and weaknesses.