Sumi was seen only briefly at the Sabbath Party, handing out various drugs to the party goers. When Ryo Asuka and a timid Akira Fudo arrive she teases him before popping two pills into her mouth, kissing Akira and pushing them down his throat. She giggles at the bewildered boy and walks off. Not long after when the two boys are being attacked by the mob, Akira falls onto the girl, landing on her chest. She laughs and warns him about a bat about to hit him. Akira's falls tot he ground and she laughs again, only for her bladder to suddenly empty and her to begin screaming as the spirit of the demon Welvath possessed the girl, distorting the girls human body to match her own.

(Source: Devilman Wiki)