She was born into the distinguished family of the Nishizumi Style of Sensha-dou, but she changed schools to Ooarai Girls Academy intending to run away from Sensha-dou.
However, perplexingly enough, she was extorted into joining Sensha-dou by the student council. She's a second year and considers her friend's feelings more than anyone else's.
She has traumatic memories of tanks because of an incident that happened during her past with a tank.
She's Ankou team's commander, and is Ooarai's de facto captain.
(Source: Official character sheet)