Mion Sonozaki is a central character in the anime series 'Higurashi no Naku Koro ni' (When They Cry). She is the heir to the influential Sonozaki family in Hinamizawa village and is known for her energetic, outgoing personality. Mion acts as the leader of her group of friends, often organizing club activities and games. Despite her tough and mischievous exterior, she deeply cares for her friends and family. Her role is pivotal in several story arcs, where her family ties and secrets significantly impact the plot.