Mayoi Ayasato is a key character in the Gyakuten Saiban (Ace Attorney) series. She is the cheerful and energetic assistant of the protagonist, Naruhodou Ryuichi (Phoenix Wright). As the younger sister of Chihiro Ayasato (Mia Fey), Mayoi is also a spirit medium in training from the Kurain Village. Her resourcefulness and spiritual abilities often help solve complex cases. Mayoi provides emotional support, comic relief, and crucial insights, making her indispensable to the story and Naruhodou’s success in court.