Sublimation

Amelia Voght (Marvel)
Amelia Voght has the power of sublimation, enabling her to convert matter into vapor at will. Mist is also a form that Amelia could take after her other powers manifested, and she is capable of transforming herself or any person or object in her line-of-sight into this state. Loose mist is virtually insubstantial, so Amelia can use this power to avoid injury.