Bellicus

Bellicus is the voice of rage and aggression in Alien X. He 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, along with Serena (and by extension Ben), have the ability to warp reality. However, due to Alien X not being able to do anything without a consensus from two of the three parts of its personality, he is relatively powerless on his own. He is the one who states that Ben is the voice of reason in this part of the transformation. Paradox cannot be 500 light years near him and Serena, or any Celestialsapien for that matter.

Appearances

 * X = Ben + 2
 * The Forge of Creation

Ben 10 Alien Force: Vilgax Attacks
Even though Bellicus is voiced by another person he still appears in Ben 10 Alien Force: Vilgax Attacks (a video game based on the animated series "Ben 10: Alien Force" and it's also based on the 2-parted, 40 minute episode "Vengence of Vilgax (part 1 and 2.) Ben got him and Serena to allow him to control Alien X before Vilgax took over the world/Bellwood/kill Ben/Kill Serena and Bellicus.

Trivia

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