Mika's mother lives with her husband and daughter in their family home. She maintains a strict, pragmatic outlook and frequently voices concerns about Mika's perceived immaturity and childlike tendencies, contrasting with Mika's doting father. She often nags Mika about her weight, repeating observations similar to those made by Mika's student, Rio Kitagawa, regarding Mika's physique.

Her primary focus is Mika's continued residence at home and unmarried status. Actively encouraging Mika to pursue marriage, she hopes it will foster independence and lead Mika to move out. This ambition fuels household tension, as Mika's father dreads his daughter leaving. Both parents, however, support Mika's teaching career and her positive rapport with students.

She demonstrates awareness of family dynamics, understanding her husband's reluctance to take trips like visiting the sea with Mika. She attempts to mediate these situations by encouraging Mika to be more accommodating, achieving varying success. Managing Mika's occasional stubbornness or tantrums requires her patience and strategic effort. She has brown or black hair.