Mika Harima (張間 美香, Harima Mika) is a friend of Anri Sonohara's who disappears just prior to the series' start. Mika had been stalking Seiji Yagiri until he nearly kills her, after which she vanishes and is presumed dead. When she returns to Raira Academy, she becomes Seiji's girlfriend and continues to be a distant friend of Anri's.