Fiona is the youngest sibling! She grew up very similar to Ai, always outgoing and breaking the rules. She was the secret mastermind between the two of them and was happy to help him sneak out. She was the only one who knew about Brooks as a child, having met him a few times. Although, Fiona grew out of the personality the closer she got to 17, when she would work as an actual cupid. When Ai breaks the rule that gets him kicked out, she is mostly angry at him. She takes it as confirmation that demons don't feel true love and starts advocating for the myth as if it were fact. She doesn't like talking about Ai and considers what he did a dumb mistake, but she still misses him and their childhood friendship.