Merge:Diamondback

Biography
Diamondback (real name Rachel Leighton) is a reformed supervillain in the Marvel Comics universe. One of the members of the original Serpent Society, Diamondback was a seductively sly woman with expertise in hand-to-hand combat, being trained by Anaconda at Taskmaster's academy. Her gimmick was that she threw acid-laced or poison-tipped diamonds at her enemies. After her first confrontation with Captain America, she was instantly smitten. She eventually betrayed the Serpent Society and led Captain America to their headquarters. After Viper's invasion, Diamondback and Captain America attempted to save the Serpents who had sided with their current leader, Sidewinder. After a fierce battle, Diamondback abandoned the Serpent Society.

Diamondback and Captain America eventually went on their first date, aided by Rachel's friends in the Serpent Society, Asp, Black Mamba, and Anaconda. Captain America's heroic charm changed Rachel's views on villainy and turned over a new leaf. Diamondback was eventually put on trial by the Serpent Society for her betrayal, and found guilty for her actions. She escaped, and along with Black Mamba and Asp, formed "BAD Girls, Inc." After a failed kidnapping attempt from Anaconda, Diamondback was taken aboard Superia's ship, and joined her Femizons in hopes of earning vast amounts of money.

She was rescued by Captain America and they continued their relationship for some time, going on several adventures with one another. They eventually ended it, and Diamondback went back to being a freelance mercenary, going on a mission with Captain America's ally, Paladin, and eventually going back with her friends in the BAD Girls. She also swapped bodies with the X-Men's Dazzler for a period of time, enticing Wolverine. She and the X-Men went on a mission to get her body back.

A second Diamondback appeared in the Secret War. Nick Fury thought to himself that when Rachel found out, she would kick the impostor's butt.

A third Diamondback, apparently the real Rachel Leighton, resurfaced as a S.H.I.E.L.D. operative, trying to rekindle her romance with Captain America, while in fact she was working undercover for the Red Skull. Truly loving Steve Rogers, but still willing to follow the plot, was confronted and killed by the Red Skull himself only to "resurrect" herself with a biomechanical form able to take over pieces of technology, like the empowering armor worn by the nazi villain. Nick Fury than explained that the "new" Rachel was an advanced LMD, in fact so advanced to believe to be human, and kept her in storage while working at a way to restore her proper programming. But before she would be restored, the Iron Maniac wiped out all her memories, and reshaped her body in a new neurokinetical armor for himself.