Ren is a human female and the twin sister of Rin. Both sisters survived a tragic accident in infancy that claimed their parents' lives. Rescued from this event, they were taken in by Wooser, who became their caregiver alongside Darth Wooser. Ren lives with Rin, Wooser, and Darth Wooser as roommates, forming a close-knit familial unit. In one documented incident, Ren transformed into a magical girl, joining forces with Rin to combat a giant Wooser.