Gingamaru Iruka

is a supporting character of the series. Seika's older sister, Iruka is a mature and friendly girl attending High School studying to become a doctor after deciding her dream when her father died of serious illness. As a result, she works hard similarly to her mother yet manages to never overwork herself. She also tries to make sure that Saki isn't overworking herself while working and tries to make sure her mother has enough sleep if she has overworked herself to the point of fainting.

Personality
Seika's older sister, Iruka is a mature and friendly girl attending High School studying to become a doctor after deciding her dream when her father died of serious illness. As a result, she works hard similarly to her mother yet manages to never overwork herself. She also tries to make sure that Saki isn't overworking herself while working and tries to make sure her mother has enough sleep if she has overworked herself to the point of fainting.