Yuu is the main character of ef: Tale of Melodies, part of which is dedicated to his past and his relationship with the previously unknown woman. In Tale of Memories, Yuu shares Chihiro's past and the story of her eyepatch to Renji. He cares about Chihiro and he doesn't want her to get hurt from a false friendship.


Yuu enjoys drawing, but he doesn't admit this fact. He is a quiet and thoughtful person during his later life, often not revealing the whole truth or deliberately being vague when questioned.