The Fearsome Foursome is a fictional supervillain group, appearing in American comic books, it included which  fictional character, a supervillain appearing in American comic books published by Marvel Comics?
Klaw (Marvel Comics) Klaw (Ulysses Klaue) is a fictional character, a supervillain appearing in American comic books published by Marvel Comics. He is depicted as a human physicist who has been transformed into solid sound, and who wears a sonic emitter on his right wrist as a prosthetic device. He has often been shown in conflict with the Fantastic Four and the Avengers and is an enemy of the Black Panther and Ka-Zar.
Firebrand (Marvel Comics) Firebrand is the codename of different fictional supervillains appearing in American comic books published by Marvel Comics. Three of them were normal humans inside powered armor and relied on fire-based weapons; one was a mutated human.