|“||Isagi Kiyoko is fastidious.||”|
|Full Name||Isagi Kiyoko|
|School||Itan Private High School|
|Year/Course||2nd year Class 1 (Current)|
|Manga Debut||Chapter 196|
Isagi has short, wavy black hair parted on the right side of her face. She wears thick, black glasses. In Chapter 204, it is revealed that her height and weight are 155.5 cm and 50.2 kg, respectively.
During her second year of middle school, Isagi's mother told her to wipe a table. The cloth that she took felt indescribably filthy to her, and from then on she developed severe mysophobia, unable to touch others and refusing to let others touch her. One day, her friend Ase Shibuki greeted her by tapping her shoulder. This caused her to recoil harshly and without thinking, call Ase filthy. She later apologized deeply to Ase, but still felt guilty seeing her friend gradually lose her confidence due to her intense sweating.