Fickle assistant

Exploration Stage: Monster Hotel
From: Valerie
Description: It's impossible for a human to hide her true identity here. It was easy for them to see that I wasn't a real witch. And I was in full costume, too. By the way, one of the "witches" who spotted me brought along a very naughty messenger. He has absolutely no discipline. Would you like to see it?
Completed: That witch's messenger stole the ghoul's earrings! If she was a real witch, the messenger would listen to her, right? I doubt it. She says she was recently summoned and hasn't had time to train yet. The detective confirmed it.