Mirela held back a smile as Gosia approached the fortune cat. It was interesting to see a non-magic human being superstitious. 
The magic charm that took form in the fortune cat was actually a signal barrier that when is set up in a room, will let the owner know if that being had ties to magic. It's only a low-level charm, so an extremely highly skilled magic user can still hide their presence. So when Gosia had stepped into the room, Mirela had already known that Gosia was just a normal human. 

"Oh... do you normally believe in those types of things?" Mirela asked, just to get a feel on what type of person Gosia might be (aka how superstitious she is).