A young woman who is currently aiding ASTARS and former STARS member. A kind-hearted, sweet, and cheerful girl who is considerate for her comrades safety, she has the talent of a medic and pianist, as well as a high IQ. She plays as Support for Tomar and Lapook, wheeling one of the captives Dys Rokata, a freshman student at Hope's Peak High diagnosed with Severe Autism who was taken from his home by Scorpius. After a successful mission and reunion with Billy Coen, Rebecca went back to her profession as a professor and kept a good contact with Dys.