Surname: Yonamine ▫Hematogenic Papillonosis▫ When bleeding, the blood transforms into butterflies. The butterflies are viscous to the touch and occasionally attempt to return to the wound, posing a high risk of infection. The condition is uncontrollable. It can only be stopped by sealing the wound. Gender: Male Age: 7 Personality: Cold, intelligent, tends to keep others at a distance. Appearance: Silver hair, black eyes, slender build, usually expressionless. True Feelings: Hates himself. Likes: The library, reading, sandwiches (bite-sized). Dislikes: High mountain peaks, overly familiar people, people who tease him. ▫Past During a school hiking trip in first grade, he and a classmate slipped and fell. While Ryo only sustained minor injuries, his classmate broke a leg. Ryo lacked the strength to carry or help them. He manifested the disease during this incident and was admitted to the ward.

Surname: Tsukumo ▫Transparency Disease▫ When stress accumulates, his body gradually becomes transparent starting from the fingertips. Uncontrollable, but he can be returned to normal by being calmed down. Gender: Male Age: 6 Personality: Hardworking, devoted. Appearance: Beige hair, wavy/curly, green eyes, scornful/heavy-lidded eyes. True Feelings: Doesn't want to be abandoned, wants to meet expectations. Likes: Sweets, playing outside. Dislikes: Being a disappointment, eyes full of contempt. ▫Past Raised under his father's strict regime to be a piano prodigy. He was constantly pressured to win competitions. After his parents divorced, his father's teaching became harsher, forcing him to play piano every single day. Heartbroken, Ryo (Megumi) began to wish he could just disappear, triggering the disease.

Surname: Setsu ▫Mask Disease▫ When stressed or suppressing his feelings, his facial expression becomes fixed in a smile, as if wearing a mask. It is difficult for him to break the smile on his own unless someone else points it out and shows him empathy. Gender: Male Age: 8 Personality: Gentle, mature, good at enduring. True Feelings: Wants to laugh from the bottom of his heart, wants attention. Appearance: Bluish-black hair, gray eyes. Likes: Fruit. Dislikes: Being put off until later. ▫Past Ever since he could remember, he was good at reading the room and being considerate of others. He was praised as a "good boy" for prioritizing others, which initially made him proud. However, the adults became so used to his consideration that they stopped noticing him entirely. "I'm never the one who gets attention." This cycle continued for a long time until the disease manifested.

Surname: Tsukishima ▫Lacrimal Gemstone Disease▫ When he cries, his tears turn into gemstones. They crystallize as they flow down his cheeks and can be sold for high prices. Caution is needed as they sometimes get into his eyes. Gender: Male Age: 6 Personality: Hesitant/faltering speech, shy. True Feelings: Wants to be independent, wants to be useful, afraid of people. Appearance: Gray hair, light blue eyes. Likes: Playing in the sun, taking walks. Dislikes: Being handled roughly, being scolded. ▫Past An abandoned child who suffered frequent violence and rough treatment at an orphanage. The disease manifested after being repeatedly told he was "useless." The orphanage grew wealthy by exploiting his illness, but after a police raid, Ayato was moved to the ward.

Surname: Usui ▫Acute Cerebral Development Syndrome▫ Grants genius-level intelligence. If he doesn't consume sugar, his brain suffers from energy deficiency, causing him to space out. Overusing his mind puts a heavy strain on the brain and may cause permanent damage. Gender: Male Age: 7 Personality: Always smiling, mood maker. True Feelings: Actively wants to help people. Appearance: Blonde hair, orange eyes. Likes: Making people smile. Dislikes: His intelligence dropping. ▫Past While returning home from a park, his younger sister was the victim of a hit-and-run. Kanata was originally not very bright or coordinated, but his sense of justice was stronger than anyone's. His desperate desire to save her triggered the disease. With his newfound genius, he performed perfect emergency first aid on the spot, saving her life. Since that experience, he has a pathological fear of losing his intelligence.

Surname: Izumi ▫Oblivion Disease▫ When experiencing intense stress, her memories gradually disappear. She can remember them once she calms down. In severe cases, she may even forget how to breathe. Gender: Female Age: 8 Personality: Quiet, observant of her surroundings. True Feelings: Afraid of adults and the outside world. Appearance: Black hair in pigtails, dull pink eyes. Likes: Rabbit plushies, fluffy things. Dislikes: Getting lost, dark places, violence. ▫Past She was kidnapped during a family trip. The extreme stress caused her to develop Oblivion Disease, and she survived by erasing her own memories. Eventually, the kidnapper was caught by the police, and Miu was sent to the ward.

Surname: Karasawa ▫Lepidoptera Metamorphosis▫ Parts of the patient's body irregularly transform to resemble a moth. For example, growing wings or developing eye-like patterns on the skin. It is heavily influenced by mental state, and patients often feel intense self-loathing toward their bodies. Isolation is required because her wing scales are toxic. Gender: Female Age: 6 Personality: Negative, kind. True Feelings: Wants to play with everyone, wants to see her parents. Appearance: Black bob cut, white eyes, moth wings on her back. Likes: Pound cake. Dislikes: Being alone, bugs, bell peppers, unsanitary places. ▫Past Raised in unsanitary conditions in back alleys since preschool. She has memories of her family smiling around a dinner table, but she eventually found herself abandoned. She lived with homeless people surrounded by flies and moths, and the lifestyle eventually triggered the disease. (In reality, she wasn't abandoned out of malice; her parents, who were drowning in debt from crimes committed to survive, left her in the alley so she wouldn't be implicated in their crimes.)