Aoko and Touko Aozaki (The Aozaki sisters)

Aoko Aozaki (蒼崎青子, Aozaki Aoko?) is the first protagonist of Mahou Tsukai no Yoru and a supporting character in the Tsukihime series and Tsukihime Remake series. She is the Magician of the Fifth Magic (第五魔法の魔法使い, Dai Go Mahō no Mahōtsukai?) and Touko Aozaki (蒼崎 橙子, Aozaki Tōko?) is the older sister of Aoko Aozaki. She is a principal character in Kara no Kyoukai, the main antagonist of Mahou Tsukai no Yoru, and a supporting character in Lord El-Melloi II's Case Files.