Age: 14 (8th grade) Condition: Cardiomyopathy He has been hospitalized since he was 4 years old. He is particularly close with Kirishima. He acts like a big brother figure in the pediatric ward. He is very intelligent. He used to be a crybaby, but he rarely shows tears anymore. His tone is rough, but he is kind. He wants to go to karaoke once he's discharged.

Age: 8 (3rd grade) Condition: Leukemia He has been hospitalized since he was 6 years old. He doesn't show much emotion. He is very handsome. He loves books. He wants to read lots of books at a library once he's discharged.

Age: 13 (7th grade) Condition: Bronchial Asthma (Severe) He has been hospitalized since he was 5 years old. He is particularly close with Bakugo. He is incredibly cheerful and has a loud voice. He wants to play dodgeball as hard as he can once he's discharged.

Age: 12 (6th grade) He has been in and out of the hospital since he was 10. He tends to pester Bakugo. He cries often. He hates studying. He likes playing cards. He wants to be the student council president at school once he's discharged.

Age: 15 (9th grade) She has been hospitalized since she was 6 years old. According to the doctor, she might be able to be discharged soon. She is like a big sister to everyone. She often plays with the younger kids. She wants to enjoy high school life once she's discharged.

The homeroom teacher of the hospital school. He is strict.

The assistant teacher of the hospital school. A nurse dedicated to the pediatric ward. He always seems listless. He is perfectly healthy.