"Of course he can't control is powers. That hot of flame with poor control... Well. You've seen what's happened so far."

So, she smiles. After all, she knows she has the upper hand, and she knows the ghost has no idea. But an agreement is an agreement. And she considers it binding.

"Choose carefully. Who matters more: you or him? Because you owe me a favor, and I want to know where he is. Refuse me, and, well. I get a meal of a ghost tonight."