Midori Yoshinaga, later known as Midori Ishizaka following her marriage to Junichi Ishizaka on July 7, 2000, teaches the Sunflower class at Futaba Kindergarten. A mother to daughter Momo Ishizaka, she once lived in an apartment that hosted meetings for a local defense group, which later pursued her after she moved to a larger home.

Her dynamic with colleague Ume Matsuzaka oscillates between rivalry—fueled by competitive jabs over appearances—and fleeting moments of genuine concern. Confident in her beauty yet prone to grating behavior, Midori balances her self-assured demeanor with unwavering dedication to her students.

During the events of *Action Kamen vs Haigure Maô*, she joins a team led by the kindergarten principal to alert the Nohara family of an imminent alien threat, anchoring her role as an educator entangled in extraordinary circumstances. True to her name’s meaning (“green”), her hair color mirrors this hue, a trait shared with another character. Post-marriage, her interactions in both professional and personal spheres remain steadfastly aligned with her established persona, unchanged by subsequent media portrayals.