Reaper
Reaper’s origin is said to be shrouded in mystery, but that’s not entirely true. He used to be Gabriel Reyes, one of the leaders of the organization that handled the Blackwatch side of the organization while Jack Morrison (who later became Solider: 76) was the public face of things.
Jealous of not getting the proper credit, he began an interagency rebellion that led to him and Morrison being presumed dead while the organization shut down. While Morrison would go to investigate why the organization collapsed, Reyes was saved by Mercy. But the process didn’t go as planned – something he still hasn’t let go of.
“A ruthless and remorseless killer responsible for terrorist attacks across the world,” Reaper’s allegiances are totally unknown. When he kills, only “empty husks” of his victim’s bodies remain—their cells showing signs of “intense degradation.” Primarily, he now works with Talon and is currently tracking down former Overwatch agents with the intention of killing them.