Name: Cain Marko
Age: Unknown (Presumed 40s)
Powers: Magically induced power of invulnerability.
First Episode: Survival of the Fittest
Must See Episodes: Survival of the Fittest, Stuff of Heroes
Originally from: Unknown
Known Family: Charles Xavier (Half-brother), David Haller (Half-Nephew)
Voiced by: Paul Dobson
Juggernaut is Cain Marko, Xavier's half-brother and most feared enemy. He used mysticism to awaken his dormant X-gene and is now virtually invulnerable. Xavier was responsible for Juggernaut's incarceration and now Cain hates his brother and would stop at nothing to finish him off once and for all. Although Mystique has tried to form an alliance with him before, Juggernaut will not be loyal to anyone and will only follow his own agenda.
Juggernaut is not vulnerable to any physical forms of attack. He is however extremely weak against psychic attacks, therefore he wears a helmet specially designed to block psychic attacks of any kind.