Personal Info:
Real Name: Cain Marko
Also Known As:
Place Of Birth: Berkley, California
First Appearance: Uncanny X-Men Vol.1 12
Known Associates:
Group Affiliation: X-Men, Former member of Excalibur, Exemplars, Brotherhood, New World Order, Exiles, Former partner of Black Tom Cassidy
Base Of Operations: Mobile
Grudges: X-Men and Professor X
Creators: Stan Lee and Jack Kirby
Gallery: Click
Enhanced Abilities: Juggernaut's strength and endurance have all been enhanced to Super human levels. He is one of the strongest beings on the planet.
Invulnerability: Juggernaut has been mystically transformed into a being possessing untold power. Juggernaut is surrounded by a mystical energy that enables him to become an irresistible, unstoppable mobile object. Once he begins to walk in a certain direction, no obstacle or force on earth is powerful enough to stop him only he can stop himself. Some obstacles (many tons of rock, for example) or forces (plasma discharge cannons) may slow his pace considerably, but nothing can stop him from advancing permanently. The mystical energy of Cyttorak makes him impervious to all injury up to and including molecular disintegration.
Self Sustenance: Juggernaut does not need food, water, or air, being sustained by mystical energies. In rare cases when a weapon breaches Juggernaut's invulnerability, Juggernaut has been able to regenerate within milliseconds.
Helmet: Juggernaut wears a helmet fashioned out of an unknown mystical metal found in the dimension of Cyttorak. With it, Marko is able to resist all forms of mental or psionic attacks.
Immortality: Juggeranut is immortal His aging process is completely halted and he is immune to the effects of all toxins, poisions, and diseases.
Cain Marko is the son of Dr. Kurt Marko, an atomic researcher, but was sent to boarding school when his parents separated. When his father married the widow of his fellow researched, Dr. Brian Xavier, Marko came to live with his new family at Sharon Xavier's family mansion. Marko was often abused by his father and took out his frustrations on his new stepbrother, Charles (later, Professor X). At one point, the young Xavier's burgeoning mutant powers of telepathy allowed him to read Marko's mind, an act which Marko took personally and never forgave him. Later, Marko had an argument with his father, which resulted in a laboratory accident, which ultimately killed his father.
Joining the military, Marko eventually embarked on his own mercenary career. At one point, when helping revolutionaries of a third-world country, Marko was jailed and met fellow mercenary Black Tom Cassidy. Cassidy used his mutant powers to help them both escape.
Later, Marko and Xavier were serving in the same American military unit in Asia, when Marko went AWOL after an attack. Xavier followed Marko, who had found refuge in a lost mystic temple of the deity Cyttorak. Marko grabbed a glowing ruby and was bodily transformed to a superhuman degree, calling himself the " Juggernaut" as part of the inscription from the temple.