Yeah. You saw the butterfly that came out of the guitar earlier. That's an akuma, and Hawkmoth always sends them when he's trying to corrupt someone. When I purify the akuma, it removes Hawkmoth's influence from the person, too.

[Ladybug leans against the wall slightly, deep in thought.]

Somehow, Hawkmoth just knows when someone's upset enough to be turned into one of his puppets. I don't know how he picks them out in a city this populated, but it worries me.