Yuzuki goes to middle school with her twin brother Kazuki and friend Ruuko. She befriends Ruuko after seeing her in the canteen with a WIXOSS card. She is very impulsive in battle and tends to commit mistakes because of this behavior.
She has feelings for Kazuki Kurebayashi, her twin brother, and to make such relationship possible, she battles in hopes of winning his affections.
After seeing what happened to Hitoe she desperately wants to win her battles to avoid her wish taking a turn on her like it did on Hitoe.
After challenging several Selectors, she wins her final battle and becomes the Eternal Girl.
In the last episode, Yuzuki is freed from her card and becomes human again.