Runa Minase

She was the person Ken was competing against with for valedictorian. She also works part time at a game store where Ken buys his Eroge. Runa is rather serious in her studies. She is also a different kind of sadist to Chizuru where she find joy in mocking Ken. Runa had a habit looking expressionless while saying spiteful things to Ken even though most of them became just for fun as she begins to know Ken.