Yellowjacket (Rita DeMara)

Rita Demara later known as Yellowjacket is a reluctant villainess turned superheroine from the Marvel Universe, Initially, Rita stole the yellowjacket suit from Hank Pym after his mental breakdown but after being saved by Black Knight and encouraged by Captain America, She realized the error from her ways and became an avenger.

History
Introduced as an antagonist to the avengers, Rita begin been certainly as first as an enemy of Wasp later as a friend and teammate, her story has been wildly varied from been appearing from time to time.

Under Siege
During the attack made by the masters of evil against the avengers, Yellowjacket was attacked by her group until Black Knight saved her from certain doom parting in friendly terms.

Evolutionary War
Rita received a signal from her stolen suit, She will later found herself helping Falcon, Captain America, Hercules, Beast, Hulk and Jocasta after explaining to them that she was manipulated by the masters of evil, accepting her aid, she helped them against the high evolutionary and Ultron, after a brief talk with Captain America however, She become a memeber of the avengers.