| Alternate Identity
| Powers and Abilities
|| Turn into Gas
| Team Affiliations
- Vapor is from the Yost Universe series The Avengers: Earth's Mightiest Heroes.
Vapor is a supervillain and member of the U-Foes.
The early history of Vapor is unknown. She got superpowers and joined the U-Foes along with Vector, X-Ray, and Ironclad.
At one point she was captured and put into the Cube, a special prison for those affected by gamma radiation.
When Graviton released all the prisoners from the four supervillain prisons, Vapor and her fellow U-Foes escaped. They were asked by Leader to help him by protecting him at all costs.
She and the U-Foes fought the Avengers and S.H.I.E.L.D.. She was defeated by Thor when he used Mjolnir on her.
Powers and Abilities
Vapor can transform into a gas. She can go through solid objects because of her cloud form.
Vapor was voiced by Colleen O'Shaughnessey.
Is currently the only animated version of the character.