Nebula

Nebula can barely be called a Hero. Her villainous roots go deep, and her alliance with the Guardians of the Galaxy is tenuous at best. Understandably, her Hero deck favors Attacks over Heroic Actions. With her electroshock batons she can quickly strike at Locations around her. Her cyborg nature allows her to repair herself easily, drawing cards back into her hand. Finally, her mind uplink can give the Heroes an edge, allowing them to swap cards from their hands with others previously played, though that also benefits the Villain, reducing the number of cards left in the Masterplan deck.

https://www.kickstarter.com/projects/cmon/marvel-united/posts/2775202