Cinder

Cinder (born as Ben Ferris) is a playable character featured in Killer Instinct (1994) and Killer Instinct (2013). A human male whose body consists entirely of super-heated plasma and living flames, Ben Ferris is a career criminal who had his civil rights revoked and was experimented on by Ultratech, accidentally resulting in his fiery state of being. In KI 2013, he's an ex-special forces operative who volunteered to have his DNA spliced with alien genetics as part of Ultratech's "Project Cinder", becoming the lieutenant and enforcer to the megacorporation's CEO, ARIA. Cinder's a dashing-rushdown character in the original 1994 game, and an aerial-dashing-trapping character in KI (2013).

Ace and the others managed to defeat him in Alverstone and was defeated again by Fox. He was then defeated again by Escanor and said he was done going after Ace and tells him to give a message to Ace he'll be waiting for a friendly rematch anytime.