Sayo

Introduced during the "Sunrise Serpent" episode, this mysterious figure struggles with worsening insomnia and fragmented recollections. Her deteriorating mental state is caused by a parasitic, snake-like mushi that inhabits the shadows and survives by consuming her precious memories. As the creature feeds, she faces the terrifying reality of losing her very identity to the darkness, making her a tragic figure caught in a desperate battle for her own mind.