Ultron is a supervillain appearing in American comic books published by Marvel Comics. Created by writer Roy Thomas and artist John Buscema, the character first appeared as an unnamed character in The Avengers #54, with his first full appearance in The Avengers #55. He is a self-aware and highly intelligent artificial intelligence in a robot body who develops a god complex and a grudge against his creator Hank Pym. His goal to destroy humanity in a shortsighted attempt at creating world peace has brought him into repeated conflict with the Avengers. Stories often end in Ultron's apparent destruction, only for the character to be resurrected in new forms.