Ayu Tsukimiya is a central character in the anime series Kanon. She is a quirky and enigmatic girl often recognized by her signature red headband and her catchphrase 'Uguu~.' Ayu is deeply connected to the past of the protagonist, Yuichi Aizawa, and plays a crucial role in unraveling the mysteries surrounding his forgotten memories. Her cheerful demeanor and mysterious aura add depth to the series, as her story intertwines with themes of love, loss, and the passage of time. As the series progresses, Ayu's true importance becomes a pivotal element of the overarching narrative.