Shion Sonozaki

Shion Sonozaki is a heroine from Higurashi no Naku Koro ni. She is Mion Sonozaki's twin sister who was also the protagonist villain of Meakashi-hen. She is well-known for her spectacular mental breakdown in Meakashi-hen and the ensuing bloodbath, her mischievous nature when it comes to teasing the other club members, and her relationship with Satoshi Hojo, which has been the subject for at least four different songs.

She is voiced by Satsuki Yukino in Japanese and Kelli Kassidi in English, both of whom also voiced her twin sister.

Summary
Shion is the older (believed to be younger by everyone but the twins themselves) twin sister of the Sonozaki twins. She was sent to St. Lucia's Boarding School, but escaped with the help of Kasai Tatsuyoshi, a man who acts like a bodyguard to the Sonozaki family. Shion is the main villain in Meakashi-hen, which appears to be Watanagashi-hen from her perspective (though certain differing events mean the two are truly separate arcs) and shows that she was the main villain in Watanagashi-hen as well. She despised Satoko Hojo in Meakashi-hen, blaming her for Satoshi's suffering, but in the arcs afterwards, the two have a sister-like bond, and Shion even puts her life on the line to save her in order to keep her promise of looking after Satoko while Satoshi was gone. In Matsuribayashi-hen, Rika Furude explains that Shion's early dislike for Satoko in the years prior to 1983 and her learning how to control her inner demon afterwards are both necessary events for Shion to not become a victim of the Hinamizawa Syndrome. Shion works as a waitress at the Angel Mort restaurant and is also the manager's assistant for the Hinamizawa Fighters little league team. In truth, she was actually born as Mion Sonozaki, the elder sister, but due to sister swapping at a young age, she had to become "Shion" after Mion was branded with the oni tattoo, a right reserved for the oldest child and thus Mion.