Aibon, known as Ai Kago in the group's real-world setting, is a member of the J-pop idol group operating a cake shop. She works with Nono under Mika-chan's leadership, often creating disruptions that demand intervention and oversight. Her actions consistently interfere with shop functions, requiring Mika-chan's active management.

Within the hybrid film "Mini Moni The Movie: Okashi na Daibōken!", Aibon's gluttony proves crucial during the confrontation with a giant cream puff monster. Her ability to consume massive amounts of food is turned against this foe, directly causing its defeat. Later, she physically engages the fairy queen Nakajalinu, delivering a decisive headbutt that incapacitates the villain despite their vast size difference.

The film also shows her transformation into a chibi-sized CGI form following a magical shrinking incident, alongside other group members and Ai Takahashi. This occurs during their mission to restore the cake shop after Nakajalinu's curse petrifies all pastries and seizes their anniversary cake castle.