Yuso Gasai is a major character of the story, "DxD: FINAL." She is a first-year at Kuoh Academy, a member of the Hunter's Association, a sub-group of the Counter-Demon Force, founded by Fujiwara and Skins. Though not directly affiliated with them, she is still technically a member of the CDF. In middle school, she was a popular student, and was known for her cute look. However, she was soon caught and nearly raped by a group of delinquents, until the timely arrival of the Perverted Trio. Since then, she has fallen in love with Issei, and wants him for herself.