Kevin Ethan Levin is a former nemesis of Ben Tennyson and one of the main three characters of Ben 10: Alien Force. He can absorb the properties of any surface and use them to fight with, which later states him as a hybrid-osmosian. Previously, he was one of Ben's most hated rivals as he tried to absorb the power of Ben's Omnitrix. He succeeded, only to result in his human form permanently mutated into a freakish combination of all 10 of Ben's aliens. He returned in Ben 10: Alien Force after being left in the Null Void since his last appearence. His DNA had later stabalized and he returned to his human self. He is now Ben andGwen Tennyson's ally as they fight the DNAliens and enemies new and old.

(Text from FusionFall Wiki.)