Mikari Izumigamine, born in the United States but raised in Japan within considerable wealth, possessed light skin, shoulder-length purple hair styled in ringlets, and light green eyes. Her distinctive heart-shaped eyebrows were later revealed to be artificial tape. She consistently wore a heart-shaped hair clip and typically appeared in her school uniform: a long-sleeved shirt, pink tie, and chocolate-colored checkered skirt. Activating her magical abilities caused the tips of her hair to transition to lime green.
Her early life was marked by significant privilege, featuring extensive pampering from her parents and a dedicated butler who granted her every desire. This period ended abruptly when a man, experiencing a psychotic breakdown due to unemployment and hopelessness, went on a rampage, killing her parents and others nearby. Witnessing this event profoundly impacted her psychological state.
Personality-wise, Mikari exhibited superiority and pride rooted in her affluent upbringing. She openly mocked others, such as ridiculing Kiyoharu Suirenji over gender identity, and engaged in intense verbal conflicts. While her actions were often intended as humor, she demonstrated genuine care for friends. Her relationship with her butler included sadistic elements; she subjected him to degrading tasks for entertainment yet simultaneously viewed him as a parental figure. The trauma of her parents' deaths fueled a deep-seated hatred for individuals she deemed "useless" or unproductive to society, believing such people deserved death.
As a magical girl, Mikari wielded a broom-shaped weapon named "Soar," provided by the administrator Hachi. This weapon enabled high-speed flight, allowing her to perform reconnaissance, facilitate escapes for allies, or transport reinforcements during conflicts.
Chapter 136 explored an alternate timeline divergence: police apprehended the man responsible before he committed any murders. Consequently, Mikari's parents survived, preventing her descent into severe depression and survivor's guilt. Without this trauma, Hachi never selected her to receive magical abilities, and she did not obtain her broomstick.
Additional details included her January 1st birthday. Her hobbies encompassed marine sports, spending money, and interacting with her butler. She preferred beach trips, sweets, and money, while disliking housework, winter, and losing. Physically, she was the shortest member of her group prior to her death.