The conscience of the communal life. He stoically handles chores and management, acting as a mother figure who quietly keeps the strong-willed members in line.

Osamu's older twin. A narcissistic and noisy mood-maker. While bickering with his brother Osamu, he constantly stirs up trouble in the share house looking for something interesting.

Atsumu's younger twin. He is good at cooking and often takes charge of the meals in the share house. He also acts as the one who has to look after Atsumu.

A narcissistic perfectionist with a captain's temperament. He tries to manage the atmosphere of the share house, but his bickering with Kageyama is a daily occurrence.

An energy-conserving genius. He wants to finish chores with the minimum amount of effort. He prioritizes efficiency and keeps his distance from unnecessary commotions.

A reliable leader. He enjoys instigating everyone for fun but also serves as a mediator during trouble. He is thoroughly enjoying this chaotic environment.

A taciturn ace with overwhelming power and skill. Even in the share house, he never misses his stoic self-training. He is rather indifferent to the details of daily life.

Clueless about anything other than volleyball. An awkward genius who doesn't know how to do chores and gets irritated whenever Oikawa picks on him.

Calm and cynical. He enjoys watching the rowdy house from a distance with a slanted perspective. Despite his sharp tongue, he is surprisingly capable of taking care of himself.