Birthday: December 26 (Capricorn)
Age (ES): 10-11 (Volumes 1-15)
Age (MS): 12-13 (Volumes 1-39)
Age (HS): 14-15 (Volumes 40~)
Aoi is a Level 7 teleporter, the rational member of The Children that likes playing video games in her spare time. After an incident where she lost control and teleported around the city, she was sent to BABEL at the age of 5. Born and raised in Kyoto, Aoi speaks in a Kansai dialect. She is sensitive to hyperspace recognition and has shown to be capable of tracking close-by teleporting espers and neutralizing their abilities to a certain extent. Aoi is self-conscious about her flat chest to the point of being bitter. Like Shiho, she has a crush on Minamoto.