Geldoff is a character appearing in American comic books published by Marvel Comics. He first appeared in the Ultimate Marvel Universe's Ultimate Spider-Man #40 (July 2003) written by Brian Michael Bendis with art from Mark Bagley. Geldoff was brought to Earth-616 by Dan Slott and Christos N. Gage in Avengers: The Initiative #8 (February 2008), where he was given the code name, Proton. Geldoff was a Latverian orphan, he was adopted by an American couple and moved to New York, and studied at Queens.

Fictional character biography

Geldoff is a Latverian orphan who was experimented on in the womb, gaining the ability to generate explosive orbs of energy. He battles Spider-Man, who attempts to persuade him into becoming a hero, before being sedated by the X-Men. After learning of Geldoff's origins, Professor Xavier plans to present him to scientific organizations and the United Nations as proof of illegal genetic research.

Powers and abilities

Geldoff can generate and discharge explosive energy balls, and appears to be resistant to his own powers.

Other versions

Earth-616

Geldoff's Earth-616 counterpart first appeared in Avengers: The Initiative #8 (February 2008), and was created by Dan Slott and Christos Gage and artist Stefano Caselli. This version is a member of the Fifty State Initiative before being killed by a Super-Skrull during Secret Invasion.

Inhuman

A separate character based on Geldoff named Geldhoff appears in Inhumanity. This version is an Inhuman whose powers activated after Attilan was destroyed, releasing Terrigen Mist into Earth's atmosphere.