Diamondback is the name of four fictional characters appearing in American comic books published by Marvel Comics. The first Diamondback is not related to the subsequent three versions that are all connected with each other. The first Diamondback was Willis Stryker, a childhood friend of Luke Cage who was killed not long after his debut in Luke Cage: Hero for Hire. The second Diamondback is Rachel Leighton, originally a super villain who was part of the Serpent Society. She was first introduced in Captain America #310 (October 1985) and became a series regular for years afterwards. The third Diamondback, Debbie Bertrand, was a mercenary that used equipment originally designed for Rachel Leighton and made her debut in the Secret War storyline. The fourth character to use the Diamondback was