A 12-year-old daughter of the Hayakawas rode on the Subway into Wonderland with her younger twin brother, Yu, in search of their lost parents. She is an energetic and intensely curious little girl who is very positive and outgoing. But, her good moods don't last too long. Ai loves creepy, cute things like her gift from Fabula, Poshepocket, with whom she fell in love with at first sight.