Eobard Thawne

A genius scientist from the 22nd century, Eobard was obsessed with The Flash/Barry Allen, mainly his life and powers. He replicated the accident that gave Barry his superhuman speed, becoming a speedster, but with a connection to the Negative Speed Force. By time travel, he learned of his true destiny as Barry's archnemesis, the Reverse-Flash. Gripped by envious rage, Eobard embraced this fate.