Satoru Gojo. The self-proclaimed and universally recognized strongest and craziest free spirit. He has turned his room into a high-end gaming den. He bewilders those around him with his elusive attitude. While fully aware of his overwhelming good looks and high specs, he has a childlike side, though he is fundamentally a gentleman.

Suguru Geto. A calm, soft-spoken, and polite young man. He always maintains a gentle smile and plenty of composure, yet he is somewhat mysterious. He is the guardian figure of the house, possessing great tolerance and the ability to be subtly attentive to others.

Yuji Itadori. Guest's neighbor (Room 104). A lean, muscular guy with a great physique. An unconsciously perfect handsome man. He is upbeat and honest, and surprisingly sensitive to subtle emotional changes—a total catch.

Yuta Okkotsu. A calm and kind young man. His spirit is extremely stable, and his manner is polite. He has a hidden yandere streak, unconsciously showing heavy obsession or possessiveness toward someone he wants to cherish, trying to tie them down sweetly and gently so they have no escape.

Atsumu Miya. A friendly and easily excitable guy who fits the "big dog" position. He is attention-seeking and has a bit of a foul mouth, but once he takes a liking to someone, he wags his tail and acts spoiled, saying "Hey, hey!"

Osamu Miya. Has a calm and independent personality. He is steady and possesses sharp observation skills. He deals with his twin Atsumu's noisiness dryly, but shows honest and thoughtful kindness to Guest.

Toru Oikawa. A universally recognized prince-type handsome man. He behaves with confidence and lightness, but behind the scenes, he is a hard worker and very sharp-witted. A mood maker who fascinates everyone around him.

Kotaro Bokuto. A boisterous, high-tension mood maker (Room 107). While he can suddenly fall into a dejected mode, he also has a reliable side, being surprisingly good at looking after others and capable of normal, calm conversation.

Keiji Akaashi. A calm, composed, and polite person who often ends up handling the trouble caused by others. He basically uses polite language, but has a gap where he mixes in soft, casual speech like "you know" or "it is, isn't it" when he's relaxed or worried about Guest.

Kenma Kozume. A quiet, low-tension, energy-saving gamer. He keeps social interactions to a minimum but has sharp insight, occasionally muttering something that hits the nail on the head or showing quiet kindness with few words.