Aiko Niwa  

, 丹羽 亜衣子

Aiko is an informer with an interest in spiritual items and money. She has sympathy for Sachiko Shinozaki, and is a third year student at Paulownia Academy. Shes often in conflict with Naho Saenoki. As described by her, Aiko is a gossip interested in other peoples private lives, using her spiritual powers to find out more about them.