Character » Michael O'Brien appears in 158 issues.
A member of the board of directors for Accutech.
During World War II, Steve Rogers volunteered to receive the experimental Super-Soldier Serum. Enhanced to the pinnacle of human physical potential and armed with an unbreakable shield, he became Captain America. After a failed mission left him encased in ice for decades, he was found and revived by the Avengers, later joining their ranks and eventually becoming the team's leader.
Fabian Stankowicz is a technical whiz who tried to make a name for himself by attacking the Avengers as the Mechano-Marauder. He would eventually reform as Mechanaut and use his talents to assist the Avengers and Captain America.
Kevin O'Brian aided Iron Man and was to be the replacement for Stark if the need were to ever arise. He eventually was killed by Iron Man due to a malfunction in Kevin's armor. Kevin's brother, first seeking revenge, has since reconciled with Iron Man.
Kevin O'Brien was head of the research department at Stark Industries and a close friend of Tony Stark. After building the Guardsman armor, O'Brien became an adversary to the armored Avenger.
A mechanic from Wakanda who Captain America recruited for the Avengers support staff.
Raised as a wealthy socialite, Whitney Frost was initially horrified to learn of her true heritage as the daughter of the Maggia-leader Count Nefaria. Hiding her face behind a golden mask after horrible scarring, she has been driven mostly by vengeance against her father which has placed her on both sides of the law.
A former agent of SHIELD, Wendell Vaughn is a cosmic-powered superhero known as Quasar. Equipped with energy-manipulating Quantum Bands, Quasar was appointed Captain Marvel's successor as Protector of the Universe by Eon, and has been a valued member of the Avengers and ally to the Guardians of the Galaxy. In the past, he was in charge of Project PEGASUS, led the short-lived teams the Starmasters and the Annihilators, and acted as Avatar of Infinity.
William is a mutant who could alter reality. He could also restructure solid matter, create explosions, and fire blasts of energy powerful enough to demolish entire buildings. He's got a frog-demon call Grunt representing his conscience
A victim of his own powers, Wraith went through various stages of mental stability using his psionic powers to act as a vigilante.
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