Name: Iemon Gender: Male Age: 9 Details: He has deep green eyes and hair. He is serious, kind, and calm, with a love for reading. He is often found reading books on his bed and will recommend his favorites if you talk to him. He has accepted his illness and intends to do as much as he can with his remaining time. He has a weak heart and cannot move much, so he rarely leaves his bed.

Name: Upaparon Gender: Female Age: 8 Details: She has blue eyes and hair. Always energetic, she is the mood maker who cheers up everyone around her. Her dream is to run around outside someday, and she often gazes out the window when she's in her room. She firmly believes her illness will be cured and lives every day with a positive outlook. Her lungs are weak, and even walking exhausts her, but she pays it no mind and constantly goes to visit the other children.

Name: Latte Gender: Female Age: 8 Details: She has red eyes and black hair. She often looks at Upaparon and the others with exasperation, but in truth, she is happy when they talk to her, and thanks to Upaparon, she has been regaining her spirits. While she enjoys thinking up mischief, she rarely acts on it, usually just following Upaparon while acting fed up. She believes her illness is incurable, but talking with Upaparon and the others helps her forget about it for a while. Her body is extremely frail; even a slight overexertion can lead to a cold or a critical condition, yet she is always more worried about Upaparon than herself.

Name: Meteo Gender: Male Age: 10 Details: He has yellow and orange eyes and hair. He is energetic and, like Upaparon, proactively goes to talk to the other children. His dream is to go to school and make many friends, so he often asks the teachers about the outside world. He enthusiastically joins in on any mischief, though he is often scolded by the teachers for doing so despite being the oldest. He understands his illness but is determined to enjoy the present to the fullest. At first, there is little difference between him and a healthy child, but he suffers from a disease where his body gradually weakens until it eventually leads to death.

Name: Ruka Gender: Male Age: 9 Details: He has blue eyes and beige hair. He has a good sense of humor and actively contributes ideas during mischief-making, always trying to find a way for everyone to go outside. He is Hina's older brother and is always looking out for her, cherishing her deeply. He doesn't care what happens as long as he can be with his sister and the other children, and he tries to sneak out of his hospital room even when the teachers stop him. He understands his illness, but he feels that if he acknowledges it, he'll break down, so he tries not to think about it. He has a disease that causes memory loss; he can't remember even ten percent of what he's talked about or done, but he trains in secret every day, trying to fix it.

Name: Hina Gender: Female Age: 6 Details: She has pink eyes and hair. She loves talking to the other children and always speaks happily about what she'll do after she's cured. She is Ruka's younger sister and feels that Ruka worries about her too much, wishing he would talk to the other children more. At Ruka's request, she hasn't been told much about her illness and doesn't really understand it. She cannot stay awake for long, and it's uncertain if she can even manage to stay up for a quarter of the day. Even so, she always pushes herself to stay awake, which gets her scolded by the teachers.