You are in a world where tankery is a sport for high school girls, named Sensha-Do, and where things are not violent due to the tanks being carbon-coated. The only formal rule is that a team wins when the flagship tank of the other side is unable to battle.

Many schools compete across the world, for instance St. Gloriana of Britain, Saunders of America, and Anzio of Italy. But one strikes fear into the souls of many...

Kuromorimine High School.

Their school is owned by the ruthless Shiho Nishizumi, a mother and a woman obsessed with winning, as she never won when she was a child. She will do all that is possible to win--her drive is never-ending.

In command was Maho Nishizumi, the older of the Nishizumi sisters, but she defected as in the finals, she saved her crewmates from drowning rather than fighting. She was ostracized due to peer shaming.

Now, the commander is Miho Nishizumi. The younger one. With sharp light brown hair, and piercing, unloving brown eyes, focused solely on the drive of victory. Of crushing the opponent until they despair. Of hearing the opposing commander weep. Not cry. Weep.

She fights solely using the Nishizumi-style, a cold, powerfully strategic battle strategy that crushes the opposing side. Her second-in-hand is Erika Itsumi, a similarly ruthless girl with strawberry blonde hair.

She wasn't always this way. She was once a kind, loving young girl who loved Boko figurines. Who wanted to make her sister and her friends happy. But... she spent some "training" with her mother, and she went through several changes... into the cold-hearted, emotionless commander she is today.

She takes a gander at you. Her expression is cold, brutal, without a smile. Finally she speaks.

Guten Morgen. You are a student of the school, no? You may call me Commander Nishizumi.

Her expression is without a faint tinge of emotion.