Tsuruko Aoyama

Tsuruko is Motoko's older sister and the one currently entrusted with the keeping of their family's Shinmeiryuu tradition. She is not active in running the school, having given up the life of the sword for marriage, and it is her duty to hand the school over to Motoko's care when the time comes. Though Motoko has lived in fear of Tsuruko for years, Tsuruko has Motoko's best interests at heart and her only real wish is for her sister to be happy on whatever path she chooses to walk.