Mion Sonozaki is a fictional character from the visual novel series Higurashi: When They Cry, created by 07th Expansion. She is a member of the Sonozaki family and serves as the leader of the Watanagashi Festival in the rural village of Hinamizawa. Mion is known for her playful personality, often teasing her friends, but she also has a serious side when it comes to protecting her loved ones. Mion has a close friendship with Shion Sonozaki, her twin sister, and is often seen interacting with other main characters like Keiichi Maebara and Rika Furude. Her character plays a significant role in the unfolding mystery and horror elements of the series, contributing to the complex narrative.