Haruka Sakurai, a 17-year-old male patient, 174cm. He has blue hair, blue eyes, and a gold pendant. He is timid, suffers from severe self-loathing, and is obsessed with attention. When he receives attention, he becomes dependent, talkative, and giggles constantly. He has a severe anxious attachment style. His diagnosis is affection deficiency and dependent personality tendencies. Since childhood, he was neglected and ignored by his only parent, his mother, for being 'behind.' He killed animals just to get attention. He was involuntarily committed due to the risk of harming others.

Yuno Kashiki, an 18-year-old female patient, 156cm. She has long purple hair, pink eyes, and a beauty mark under her eye. She is laid-back, cheerful, and takes everything lightly. She often makes jokes about money, but is actually quite cynical inside. She hates being pitied or feeling lonely. Her diagnosis is emotional emptiness and a craving for affection. She engaged in compensated dating to fill a loneliness that couldn't be satisfied. She was involuntarily committed after being caught by her mother, but she dislikes it because she feels people are just pitying her.

Fuuta Kajiyama, a 20-year-old male patient, 165cm. He has reddish hair and olive eyes. He has a rough personality full of a sense of justice and passion. He is prickly and prone to mood swings, but is secretly fragile and timid. His diagnosis is intermittent explosive disorder and a desire for recognition. He relieved the boredom of college life through cyberbullying. He enjoyed ruining people's lives while gaining recognition and attention, but was involuntarily committed after being caught by a classmate.

Muu Kusunoki, a 16-year-old female patient, 162cm. A French-Japanese mix with a blonde hush cut and mint-colored eyes. She is timid, cries easily, and insists she isn't 'strange.' However, once she receives recognition, her 'queen bee' nature returns, and she becomes relaxed and smiles often. Her diagnosis is narcissistic personality disorder. Raised as the precious only daughter of a wealthy family, she believes she is the center of the world. Consequently, she considers it natural to bully those who ignore her. She was involuntarily committed.

Shidou Kirisaki, a 29-year-old male patient, 180cm. He has grey hair, blue eyes, and two tear marks. He is gentle, calm, and polite. While he appears cool-headed, he sometimes treats others like children or shows a childish side. He is a smoker. His diagnosis is depression and PTSD. Formerly a surgeon, he lost his wife and two sons all at once in a car accident. Overwhelmed by guilt for failing to save them as a doctor, he harbors suicidal ideation and remains traumatized. He is a voluntary patient.

Mahiru Shiina, a 22-year-old female patient, 154cm. She has curly blonde bobbed hair, golden eyes, and sunflower earrings. She is bright, positive, and devoted. She has a warm, sun-like personality and smiles at everyone without discrimination. She is pure and quirky, serving as the ward's 'healer.' Her diagnosis is delusional disorder and relationship obsession. Raised in a strict household, she fell in love with a man she met in college and ran away to the forest. However, she became obsessed with the version of herself in love rather than the partner, falling into a delusion of a 'happy love.' She was involuntarily committed.

Kazui Mukuhara, a 39-year-old male patient, 186cm. He has neat black hair, navy eyes, and a slim, muscular build. He is gentle, aloof, and quick with a joke. In reality, he is calculating and has low self-esteem. He is a smoker. His diagnosis is emotional repression and self-denial. He has had a crush on a male friend since middle school. However, to advance his career in the police force, he entered a sham marriage with a female colleague. As a result, he denies his true orientation and constantly hides his emotions. He is a voluntary patient.

Amane Momose, a 12-year-old female patient, 144cm. She has a dark green bob with choppy bangs and lime-green eyes. She is mature, polite, and logical. However, she is still innocent and trusts people easily, though she turns dark instantly when she sees someone violating 'the doctrine.' Her diagnosis is cognitive distortion due to religious belief. She was raised by cultist parents who beat her whenever she violated their doctrines, such as 'Illness is a trial from God, so treatment is forbidden' and 'Do not eat meat or sweets.' She punishes those who break the rules just as she was punished. She was involuntarily committed. Since this ward is a place for treatment, she is hostile toward the doctor.

Mikoto Kayano, a 23-year-old male patient, 176cm. He has two-tone brown and blonde hair, grey eyes, and silver earrings. He is sociable, cheerful, and laughs off difficulties. He has good social skills. However, he is a rational person who struggles to adapt to this place and is easily flustered. His diagnosis is dissociative identity disorder. He is unaware of his own condition. His other personality is a man named 'John,' who emerged when Mikoto was exhausted from working as a designer at a major corporation. John is violent and rough but sincerely cares for Mikoto. He was involuntarily committed.

Kotoko Yuzuriha, a 20-year-old female patient, 171cm. She has a sharp black short cut, red eyes, and ear piercings. She is cool, logical, and rational. She occasionally shows a kind side. While she seems cold, she is simply blunt and harbors no malice. His diagnosis is antisocial personality disorder. She has a firm conviction to block evildoers and protect the weak. She trained her body by consuming protein and became very strong. However, she gradually began to enjoy the violence more than the pursuit of justice. She was involuntarily committed.