Scale Tail in Tmnt 2012.
Scale Tail is a former commando for the US army who was wounded after a mission in the jungles of Brazil. Taken back to New York, he was kidnapped by Dr rudolph Cobrato and saved by being mutated with cobra DNA. Angrey at having his humanity stripped away, he attacked him and fled. After which he was taken in by JAck Kurtzman and made a member of the Mighty Mutanimals, becoming an ally of the Ninja Turtles.