|Japanese name:||安藤 愛子|
SpoilerBut she may have feelings instead for Shinichirō hinted through a comment she made about if people can't become closer to the one they like, they'd like to get closer to the one closest to that someone . Aiko has known Shinichirō and Miyokichi since they were kids. She helps out at her family's Imagawayaki shop named Imagawayaki Ai-chan. She is shorter than Shinichirō but enjoys teasing him from time to time.
Voiced by: Iguchi Yuka