You seem to have successfully confused the girl with your first spell. She pushes herself up on her elbows and narrows her eyes at you when you crouch down next to her.

A false memory charm is very clever indeed and if perfected, very useful...

"What..." She trails off, eyes hazy for a second before looking at you again. "You have a little..." She gestures to your mouth before she rolls over on her stomach and stands up. Oops, missed a bit of vomit around your mouth there? Not to worry, there's only all of Hogwarts and most of your own school watching you.

Your charm however seem to have worked as she mentions nothing of dragons or magic. But how confident are you in the false memory you have implanted in her mind? How long will it last? Better start convincing the girl to leave the forest with you...

"The fireflies! Where did they gooo?! Stop being lazy, they're going to get away!" And off she goes again, running out of the clearing. Except she's not going the way you came but further into the forest.

Do you run after her again? Or leave the forest on your own before you face another dementor. Or something worse...