Koharu Yoshida is the mother of the protagonist Komugi Yoshida. She works as a nurse and is known for preparing bento lunches that are notably particular or unusual in their composition. She has short pink hair and red or purple eyes. Her family includes her husband Tomoya and her younger son Kotarou. As a supporting character, her role in the story is primarily domestic, providing a stable family background for Komugi. Her relationship with her daughter is caring and supportive, though her screen time is limited. Her personality is not extensively explored, but she is portrayed as a responsible and devoted mother and medical professional. Her motivation centers on her family and her nursing work. Her most distinctive trait is her idiosyncratic cooking style, and her nursing expertise is implied by her profession. She does not undergo significant personal development over the course of the series.