Haruko's basically the strongest fighter among the maidens at Tenbi—at least according to Kodama Himegami—and she serves as Vice-President of the student council. She's Takeru Ooyama's childhood friend, and she's got pretty obvious feelings for him that she doesn't bother hiding, especially when it comes to casual situations involving her body around him. She shares a dorm room with Takeru, Kodama Himegami, and Inaho Kushiya.
Her weapon is Murakumo, one of the eight legendary maken. The name means "Gathering Clouds," and the blade lets her convert her element into photons. The thing is, Murakumo's seal is locked until it faces opponents strong enough to match its power—though Haruko has managed to tap into some of its abilities through sheer anger, which kind of proves the seal isn't completely foolproof.
Content compiled by AnimeList.moe from publicly available sources.