Shion Sonozaki is a pivotal character in the anime series Higurashi no Naku Koro ni, known for its dark and intricate storyline. She is the twin sister of Mion Sonozaki and a member of the influential Sonozaki family in Hinamizawa village. Shion is initially presented as cheerful and outgoing, but her character reveals a complex duality, torn between loyalty and her own desires. Her role is crucial as she becomes entangled in the village's sinister mysteries and family secrets, often driven by intense emotions and a quest for truth, which significantly impacts the series' narrative.