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OV04 Bellicus
General Information
Species Celestialsapien Personality
Home World Inside Alien X
Affiliations Alien X
Ben Tennyson
Occupation(s) Alien X's Voice of Rage and Aggression
Powers and Abilities
Abilities Reality Warping
Relatives Serena (counterpart)
Ben Tennyson (as Alien X; counterpart)
Alien X (host)
Voice Actor Kevin Conroy (Alien Force)
Jeff Bennett (Ultimate Alien)
Eric Bauza (Omniverse)
First Appearance X = Ben + 2

Bellicus is Alien X's voice of rage and aggression.


Bellicus looks like a male green human face with very realistic features (i.e. the wrinkles on his face).


He first appeared in the episode X = Ben + 2 when Ben transformed into Alien X, and Ben quickly discovered he was locked inside the form because of the eternal debates between the two entities who control its body, Serena and Bellicus.  He is the one who states that Ben is the voice of reason in this part of the transformation. Professor Paradox is not allowed to be closer than 500 light years to him and Serena, or any Celestialsapien for that matter.

Powers and Abilities

Bellicus, along with Serena (and by extension Ben), has the ability to warp reality.


Due to Alien X not being able to do anything without a consensus from two of the three parts of its personality, Bellicus is relatively powerless on his own.

Bellicus can be terrified by Toepick's face.


Ben 10: Alien Force

Ben 10: Ultimate Alien

Ben 10: Omniverse

Video Games

Ben 10 Alien Force: Vilgax Attacks

Ben got him and Serena to allow him to control Alien X before Vilgax took over the world.


Bellicus' name seems to be derived or based off "Belligerent" or "Bellicose", meaning very eager to fight, which describes much of Bellicus' personality.


  • Bellicus seems to have a fondness of the dinosaurs, as he tried to persuade Ben into preventing their extinction in X = Ben + 2.
    • Bellicus' tabled motion to save the dinosaurs was argument number 80 million and 3 (80,000,003).
Ah PuchArgitBaz-ElBellicusBlarney T. HokestarGalactic GladiatorSerenaSheriff of BellwoodStarbeardStone CreaturesStrabismus

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