Mitsukasa Ayase is a key character in the visual novel 'Riddle Joker,' developed by Yuzusoft. She is a student at the prestigious academy where the story unfolds, and possesses psychic abilities. Ayase is known for her calm and composed demeanor, often acting as a voice of reason within her friend group. Her psychic powers make her a valuable asset in solving the mysteries that arise throughout the series. Ayase's role is crucial as she helps the protagonist navigate the challenges they face, while also dealing with her own personal growth and challenges.