ナイン・ヴァイオレット

Tesla's twin sister, who is quiet and unassuming. She is well-liked by some female students, possibly for her boyish appearance. Despite being expressionless, she is kind-hearted and enjoys spending time with the animals in the backyard. Like Tesla, she once served as an adversary as Twin Phantom, but she has since reconciled and become a friend.

After her transformation, she overwhelms her enemies with powerful attacks using her great sword.