Susumu Ishikawa attends Chutei University Kamimaezu High School as a major supporting character. His surname combines the kanji for stone (石) and river (川), while his given name Susumu signifies "advanced." He sports dark hair with light blue highlights near the ends and distinctive purple eyes, appearing typical of high school age. Susumu has an older brother, Hajime Ishikawa, who also studies at the same institution. Both brothers actively participate in their school's competitive activities, with Susumu operating within a team-based role at the school.