Read more about Death Locket at: Wikipedia

Official Site: Marvel

Death Locket (Rebecca Ryker) is a fictional character appearing in American comic book published by Marvel Comics.

Death Locket first appeared in issue #1 of the Avengers Arena series as part of the Marvel NOW! event, and was created by Dennis Hopeless and Kev Walker.

Death Locket appears as one of the main characters in Avengers Undercover beginning in 2014.

A female teenage version of Deathlok is one of sixteen teenagers kidnapped by Arcade who forces them to fight each other to the death in his latest version of Murderworld. As the games in Murderworld begin, she faces off against Hazmat and then fights Cammi soon after. Cammi gives her the nickname Death Locket. Throughout the first day, Death Locket remembers the past events that led to her origins. She is revealed to be Rebecca Ryker, the daughter of Harlan Ryker. After being maimed in an explosion that killed her mother and brother, Rebecca was rebuilt using the Deathlok technology that her father developed. She joins the Braddock Academy group (consisting of Apex, Kid Briton, Anachronism, Bloodstone and Nara). Juston is attacked by an unidentified cybernetic creature and the Sentinel he is working on folds around him apparently crushing him.

Death Locket has not been a contender in any CBUB matches.