The eldest child of the Katsuragi family and the English teacher at Rinin High School, where she is the most popular teacher. Shiori recently married the physical education teacher of Rinin High School, Tomonobu Nakamura. She lives in an apartment just a few minutes away from the rest of her family. Shiori is a long time friend with Suzuko since high school, and is one of the few people that can see past her cold appearance. Like her mother, Shiori is aware of the Rinkan Club. Balloon Belly: After spending a week being raped by the Rinkan Club, 50 guys end up pumping her full of their cum and then plug her up with an extremely long dildo, causing her stomach to inflate and make her look pregnant. They leave it in her for a full day before letting her take it out. Big Sister Instinct: She immediately knew some was troubling Maki, after Maki witness their mother be violated by the Rinkan Club. Childhood Friends: With Suzuko. Cool Big Sis: To her siblings, Maki and Mamoru. Happily Married: With her husband, Tomonobu. However, that comes to an end once the Rinkan Club enters the picture. Heroic Sacrifice: Nominated herself as the next shrine maiden to save her mother. Unfortunately, it didn't do much good as her childhood friend, Suzuko, ultimately sentenced both her and mother to be shrine maiden for life. Hot Teacher: She was considered Rinin High School's hottest teacher before Suzuko joined the staff, after which they're basically tied, depending on a student's personal fetishes. Potty Failure: At the end of Episode 3. Your Cheating Heart: She consciously decides to cheat on her husband so her mother would stop being used by the Rinkan Club.