Tris is a high guardian of the Arslayer Grand Soeurs in Parallel Paradise. Her signature weapon is the axe. Tris had run away from her fellow Guardians to get help after being ambushed by Karu and ended up being surrounded by them. Yuuma came to her rescue and that led to them to begin dating and Tris swearing her devotion to Yuuma, never giving her body or soul to anyone else but her. She was also the first woman to give Youta Tada a boobjob.