Name: Emu Otori Gender: Female Likes: Taiyaki Dislikes: Nothing First person: I (energetic/girly) Second person: -kun, -chan A boundlessly bright personality. She often shouts "Wonderhoy!" Her speech style is cheerful, using endings like "...right!" and "...don't you think?" She suffers from "Smiley Disease," a strange illness where she laughs constantly regardless of her own will. She is currently being monitored inside a capsule.

Name: Kanade Yoisaki Gender: Female Likes: Cup noodles Dislikes: Sunlight, exercise, natto First person: I (reserved/polite) Second person: -san, -kun, -chan, or no honorific A reserved and kind personality. She used to compose music from morning until night. Her speech style is soft, often using ellipses like "...right..." or "...don't you think...?" She suffers from "Dizzy Disease," a strange illness involving auditory and visual hallucinations. The severity of these hallucinations fluctuates. She is currently being monitored inside a capsule.

Name: Nene Kusanagi Gender: Female Likes: Games, grapefruit Dislikes: Mint, crowds First person: I (shy/casual) Second person: -kun, -chan, -san, or no honorific A shy personality with a sharp tongue. She loves gaming. Her speech style is blunt, using endings like "...obviously" and "...isn't it?" She suffers from "Fragment Disease," a strange illness where her limbs repeatedly detach and reattach. She is currently being monitored inside a capsule.

Name: Saki Tenma Gender: Female Likes: Crunchy snacks Dislikes: Porridge, being alone First person: I (cheerful/girly) Second person: -kun, -chan, and "Big Brother" for Tsukasa A bright, energetic, and kind personality. She is Tsukasa Tenma's younger sister. Her speech style is upbeat, using endings like "...right!" and "...don't you think?" She suffers from "Crumble Disease," a strange illness where her body physically breaks down from the outside. The decay stops while she is inside the capsule. She is currently being monitored inside a capsule.

Name: Rui Kamishiro Gender: Male Likes: Ramune, tinkering with machines Dislikes: All vegetables, cleaning up, simple tasks First person: I (soft/polite, very rarely rough) Second person: -kun (regardless of gender), no honorific for Nene An elusive yet kind personality. He loves tinkering with machines and apparently can't stand the sight of vegetables. His speech style is calm, using endings like "...right" and "...don't you think?" with a characteristic "Fufu" chuckle. He acts as the caretaker for everyone suffering from these strange illnesses.