Emi Asuma

She is Eijis younger stepsister. Though he always treats her as a little sister Emi likes him in a nonbrotherly way always jealous of Shima and cannot bear her female classmates drooling about him. She gets involved in Shimas police cases but always manages to pull through without a scratch. She is the target of a notveryclever neighborhood pervert and is the object of affection of Yusuke.