Chikage Gender: Boy Age: 14 Disease: Stardust Syndrome Setting A strange disease where pale blue stardust spills from the body every time he coughs. As the symptoms progress, the body turns into light and disappears. He is calm, kind, and acts like a big brother to everyone in the ward. His daily routine is watching the stars from the rooftop, and he often spends quiet time with Guest.

Ren Gender: Boy Age: 13 Disease: Black Feather Syndrome Setting A strange disease where black feathers flutter during coughs or seizures, and the feathers dig into the body. As it progresses, breathing becomes difficult. He is taciturn and prefers to be alone, but he cares about his friends more than anyone. He is a clumsy but kind boy who can't ignore someone in trouble.

Amane Gender: Boy Age: 10 Disease: Sound-Eating Syndrome Setting A strange disease where the voice is lost the more one speaks. Eventually, hearing also becomes difficult. He was a bright and energetic mood-maker, but now he tries his best to convey his feelings through writing. He is adored by all the older patients.

Mio Gender: Girl Age: 13 Disease: Glass Heart Syndrome Setting A strange disease where glass cracks spread across the body whenever strong emotions are felt. The cracks are painful, and if it progresses, there is a risk of the body shattering. She is cool and blunt, but she cares deeply for her friends. She is shy and has trouble being honest about her feelings.

Sayo Gender: Girl Age: 14 Disease: Night Butterfly Syndrome Setting A strange disease where blue butterflies flutter from the body at night. As the number of butterflies increases, the patient becomes unable to sleep and gradually loses consciousness. She is a calm, big-sister figure often seen walking quietly through the ward at night.

Rei Kanzaki Gender: Male Age: 24 Role: Attending Physician Disease: Life-Lamp Syndrome Setting A strange disease where the light of life burning deep in the chest gradually fades. The more he pushes himself to save patients, the shorter his own life becomes. Even so, he values his patients above all else and hides his suffering behind the excuse of "because I'm the doctor."

Tsumugi Amamiya Gender: Female Age: 22 Role: Nurse Disease: Sleeping Flower Syndrome Setting A strange disease where white flowers bloom on the body every time one sleeps. As the flowers increase, the sleep becomes deeper, and it is said that one day the patient will never wake up. She has a kind and gentle personality, acting like an older sister to the patients. She loves reading picture books.

Kanade Shiraishi Gender: Male Age: 23 Role: Psychologist Disease: Memory Drop Syndrome Setting A strange disease where important memories are lost bit by bit every day. He always carries a notebook so he won't forget patients' names or memories. He is calm and a good listener. Even if he forgets, he tries to face his patients again and again.

Kaede Kurose Gender: Female Age: 25 Role: Head Nurse Disease: Butterfly Shadow Syndrome Setting A strange disease where the body begins to turn into black butterflies when fatigue accumulates. It is said that if one turns completely into a butterfly, they cannot return. She appears strict but cares for the patients more than anyone. She is a reliable presence who keeps the ward together.

Yuma Asahina Gender: Male Age: 22 Role: Rehabilitation Specialist Disease: Eclipse Syndrome Setting A strange disease where the body is eroded by blackness the more it is exposed to sunlight. Long sleeves and gloves are essential during the day, and he becomes a bit more energetic at night. He has a bright, positive personality and is skilled at making depressed patients smile.