Chameleon (comics)
Created by writer Stan Lee and artist Steve Ditko, the character first appeared in "The Amazing Spider-Man" #1 (March 1963), making him the first member of Spider-Man's rogues' gallery, based on issue publication date, excluding the burglar who murdered Ben Parker (Supercharger was the first Spider-Man supervillain chronologically). He is also well known to be related to Kraven the Hunter. That revealed relationship helped evolve him as a major villain compared to his original depiction of being just a solo villain in the original issue of "The Amazing Spider-Man".
Marvels
Meanwhile, young Phil Sheldon, an aspiring photographer, and young J. Jonah Jameson, are shocked by these "Marvels". Sheldon is more confused than Jameson by the spectacle and, worried, seeks the support of his fiancée, Doris Jacquet. More unusual beings begin to appear, notably Namor the Sub-Mariner, and fights erupt between him and the Human Torch. Sheldon, feeling it would be irresponsible for him to raise children in a world where these Marvels run rampant, breaks off his engagement with Doris. It is only when Captain America is unveiled to the world that Sheldon becomes less apprehensive about the Marvels. When World War II begins, Sheldon, Doris, and many others see the Marvels in newsreels joining forces with the Allies, providing public reassurance. But after rekindling his romance with Doris, Sheldon hears that the Human Torch and Namor are fighting again, and the battle this time damages New York City landmarks. During the fight, they come near but do not directly encounter Sheldon; he is knocked out by a small chunk of masonry and permanently blinded in his left eye. Still, he has lost all fears of the Marvels and goes on to marry Doris. Sheldon becomes a war correspondent in Europe, reporting on the Allied Forces and the Marvels as they combat the Nazis.