Fantasma wouldn't be surprised at that revelation. A lot of the time, she stays hidden on Mammon's person, or at least she has been as of late. Pet frogs that are carried around on the shoulder tend to be noticeable.

The suggestion makes Mammon rub at the bridge of their nose. "I suspected it was something like that... But I was hoping that things would sort themselves out if Fantasma was here long enough. That doesn't stop it from being anymore annoying... She's my partner, and very useful."