The man known as The Chameleon is a Russian super-spy, a master of disguise, and a brilliant actor. He is the half-brother of Kraven the Hunter, and the two have often teamed up against their common adversary: Spider-Man.
The Chameleon can make a life-like mask of anyone he meets, and can mimic nearly any voice he hears. He uses these uncanny talents in pursuit of criminal and terrorist activities. Nobody has ever seen his real face, as he always wears a hard plastic white mask under his disguises.
Later, Chameleon gained the power to mentally alter his form and voice, similar to Mystique. In one of those adventures was where he nearly got the police to believe he was Spider-Man himself, in there unforgettable encounter.