Erika Furudo is a major character in the visual novel and anime series Umineko no Naku Koro ni. Introduced as a guest on Rokkenjima island, she is later revealed to be a cunning and highly intelligent detective. Erika serves as an opponent to Battler Ushiromiya, challenging him in the witch's game with her sharp reasoning and logical approach. Her role is pivotal in the series, representing the human side of the witch-versus-human conflict, and she is notable for her eccentric personality and deductive prowess.