to experience their different side of life, she was mistakenly taken as Mion and branded with the oni tattoo, ultimately causing her to stay as Mion. She organizes a variety of strategy-based games for the members to play with penalties for any losers. Penalties usually involve wearing embarrassing or frilly outfits on the way home. Each game she organizes involves bending the general rules or using questionable and crude methods to win such as playing cards with a marked deck or using feminine wiles to discourage opposition. Played by: Rin Asuka (film), Rika Nakai (TV series) Mion's identical twin sister living in Okinomiya. In spite of their externally different personalities, they often switch places and it can be difficult to distinguish between them. It is noted by Rena that, although externally the twins are very different on the inside, they are really the same. Their first switch took place when they were little. Right before tattooing the symbol of a demon, the sisters swapped their roles together to live their own lifes as one another with the real Mion becoming Shion while the real Shion became Mion who later has her entire back tattooed to denote her as the Sonozaki heir which was only mentioned in the sound novel and manga. A year before the storyline shown in Meakashi chapter, Shion abandons St. Lucia Academy that her grandmother, Oryu sent her to as she strongly dislikes her own boarding school and returns to the village. In spite of it, she and Mion maintain a close relationship and helped each other. She later meets Satoshi who she develops an instant liking to him after he rescue her from the delinquents after accidentally angering them. In most of the arcs, she is at a different school from the other characters, and therefore appears less frequently. Shion blames the Three Families for Satoshi's disappearance in Watanagashi-hen and Meakashi-hen (the latter told from her point of view). In the sound novel, manga and anime, when Oryu became aware of Shion living in Okinomiya and exposing her true identity, she was summoned to the main house and forced to perform a "Distinction of Right and Wrong," a ritual of self-mutilation to pluck out three fingernails in front of witnesses in order to purge her 'sins'; first with Kasai, her close bodyguard for assisting her to escape the school, second with Yoshirou, one of her uncles