A magical girl part of the organisation called Darkness Rainbow, she is an enemy of Yurika, as the two organisations Darkness Rainbow and Rainbow Heart are enemies of each other.
Appearing as an enemy, and being the main villain of Volume 5, she later on becomes very friendly with Koutarou after he saved her life (Volume 8). From then on, she sees Koutarou not as an enemy, but as a close friend who she does not wish to harm. While still part of Darkness Rainbow, eventually she decides to leave them and live on simply as Aika Maki, and not a member of Darkness Rainbow (Volume 12).
