Constellation:

Character:

Tsukumo's older sister, Yuki's relative and also a Zweilt guardian. Her ring transforms in a huge sword. She attends the same high school as her brother, where their closeness make all the girls jealous , telling him that "He is a person who is to kind for their own good" and asking her to refer to her in a more close wayinstead of calling her Toko-san.

Source from Wikipeida