Allen the Alien is an Image Comics character who first appeared in the Invincible series.
An apparent alien aggressor, who Invincible's father, Omni-Man had fought several times in the past, all without talking with Allen. One on such incursion, Omni-Man ordered Invincible to fight Allen. Invincible, not seeing a point to the fight, decided to talk with Allen, and they realized that Allen had made a mistake. He was supposed to go to the planet Urath and test its champion, not to Earth.
He is a Champion Evaluation Officer who works for the Coalition of Planets. He travels on a tight schedule and tests the skills of various powered heroes on each planet in order to determine if there is a suitable "champion" to defend that planet. He and Mark have formed a mutual friendship. Allen starred in issue 23, which was styled after a Silver Age comic, complete with complicated foot notes and florid prose.
Allen's race lost their homeworld after the Viltrumite invaded. The survivors managed to maintain their race in space until they found a new homeworld, breeding artificially until the very concept of natural procreation is offensive to most of Allen's people. This hampers Allen's relationship with his girlfriend, who is a lusty sort of female. Allen's people also conducted genetic experiments to create warriors capable of fighting the Viltrumite Empire, failing and losing all test subjects except for Allen (similar in origin to the Super-Skrull).
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Official Site: Image Comics
Researched by: Betterman