Mifuyu Kiba
Best friend of Chisato. Due to her frail health, she was hospitalized for a long time and thus having to repeat a year, she grew a complex due to that but was overcome with the help of Chisato and Yuki. She also has a habit of citing old jokes, explaining it by the fact she’s a year older.
Mifuyu is aware of Chisato’s feelings for Yuuki, and constantly cheers her on. However, it is later shown that Mifuyu had kept her own feelings for Yuuki, silent. She also has a scar which she is afraid to show to people, coming from the various surgeries she had to take when she was hospitalized.