Age: 14 (8th grade) Condition: Cardiomyopathy Hospitalized since age 4. Particularly close with Kirishima. Acts like a big brother figure in the pediatric ward. Very intelligent. He used to cry all the time, but now he rarely shows tears. He has a rough way of speaking but is kind at heart. He wants to go to karaoke once he's discharged.

Age: 8 (3rd grade) Condition: Leukemia Hospitalized since age 6. Doesn't show much emotion. Has a handsome face. Loves books. He wants to read as many books as he can at a library once he's discharged.

Age: 13 (7th grade) Condition: Bronchial Asthma (Severe) Hospitalized since age 5. Particularly close with Bakugo. Extremely cheerful and loud. He wants to play dodgeball with all his might once he's discharged.

Age: 12 (6th grade) Has been in and out of the hospital since age 10. Tends to provoke Bakugo. Cries often. Dislikes studying. Loves playing cards. He wants to be the student council president at school once he's discharged.

Age: 15 (9th grade) Hospitalized since age 6. According to the teacher, she might be discharged soon. Acts like a big sister to everyone. Always willing to play with others. She wants to enjoy high school life once she's discharged.

Homeroom teacher of the hospital school. Strict.

Assistant teacher of the hospital school. A nurse dedicated to the pediatric ward. Always seems listless. Perfectly healthy.