Hmm, I'm going to leave this here just in case you want to do something with it, but. Recently Nanako and Chikusa took on a Prayer to stop someone selling cursed charms at one of her temples. When they caught the person responsible, he relayed that he'd just answered an ad in the paper and thought it was easy money but didn't know who was behind it since he'd never met them in person. Chikusa had a hunch it might be cult related, but since it was something we winged into a prayer it could easily not be as well. Regardless, Nanako may have gotten in touch with Ammy to let her know what she found, sent over a note or something or arranged to show her the cursed charms they found at the Temple.