She is first introduced while possessing Mai Urami and attempting to attack Seireitou. She lures Seireitou to Mai's house and attempts to attack until Seireitou foresees the attack and releases Kurumu's control over Mai. Released, she soon begs for Seireitou's forgiveness, saying that she only wanted to have fun in the human world. Seireitou soon forgives her. She also then mentions Noh, a demon who hunts her and requests Seireitou and Hikaru's help in protecting her. Seireitou reluctently accepts her request.