Soryuin Shion is the board chairwoman of the Koyo Academy Group, a member of the Kengan Association and the ex-girlfriend of Hatsumi Sen. Eighteen years ago, while she was still in high school, Shion first met and soon started dating Hatsumi Sen for the first time. During that time, he took Shion to Tochigi Destiny Land, but they had a fight and broke up afterward because she caught him cheating. Two years after they first started dating, Hatsumi left again, telling Shion he was going on a journey to fight powerful fighters, but Shion saw the truth when she picked up an adult tour program that he had dropped. Years later, Shion reencountered Hatsumi at his debut Kengan match where she saw him flirting with the Nogi Group's new secretary, Akiyama Kaede. (Source: Kenganverse Wiki)