The older sister of Miho and the commanding officer of Kuromorimine school team.

Maho is well known for her intense passion of Sensha-dō and for being a talented leader who is well-respected by her mother, sister Miho and all of her teammates. She seems cold and distant toward others at times, but this is actually a facade in order to fulfill her mother's strict expectations. In reality, she's a very kind person, even to her opponents, and loves Miho dearly. The reason she strives to be a good Nishizumi heiress is so that her younger sister Miho will be free to live her life as she wishes.