Vilgax

Regarded as "the most dangerous being in the universe", Vilgax is a ruthless, cruel, and power-hungry galactic warlord. In nearly all his encounters, Vilgax operates with the single-minded objective of acquiring the Omnitrix and exploiting its technology to build an army capable of transforming into aliens at his command, then using that power to conquer the entire universe.

Throughout his entire pursuit for absolute power, Vilgax was not willing to let anyone or anything stand in his way. As such, he would get revenge on anyone who defeated him before. This shows that Vilgax can hold a grudge, most notably against Max and his family for the great number of losses he has suffered at their hands. Between this and his imprisonment in the Null Void, he has developed such a pathological hatred towards Ben that he wants to kill him as much as get the Omnitrix. Of course, Vilgax's quest for the Omnitrix slowly became his secondary goal as his desire for Ben's defeat and/or death became even greater.

Vilgax originally chased Ben Tennyson merely to achieve this goal and had few concerns about his fate once he had the Omnitrix. But after escaping the Null Void, he seemed to have gone partially insane, as he was enraged more easily and exhibited facial ticks.

Vilgax is one of the most feared beings in the universe, having conquered ten worlds, destroyed five others, and created a black hole by condensing a star. In short, he has such a fearful reputation that almost no sentient life-form is willing to work for him, apart from Psyphon. Because of this drawback, he has to use armies of robotic crewmens and Mechadroids, obedient machines programmed to serve him as his crew and soldiers. However, Vilgax is capable of hiring mercenaries, if he can meet their price.

Initially, Max was a foil to Vilgax, who was at first the only person who had ever defeated him. However, after he began his quest for the Omnitrix, Max's grandson Ben became his ultimate foil, making the two sworn archenemies for years to come. And while Ben is rather comedic and is usually looking out for others, Vilgax is always portrayed a serious character and only looks out for himself, with the exception of his own race.

Vilgax can be very manipulative, notably so of the Galactic Code of Conduct, in order to achieve his goals. This becomes very useful when discovering that his squid-like form resembles the alien of knowledge worshiped by a cult of humans known as the Flame Keepers' Circle. Adopting this role for his own, he skillfully manipulates his new followers into helping him escape the Earth.

Despite his cruel and villainous tendencies, Vilgax does care about his own people (taking his role as Vilgaxia's ruler and champion very seriously), so much so that he is willing to put his own life on the line and use whatever other means necessary to ensure Vilgaxia's and its people's safety; even if it means begging his enemies for help. Even then, judging by his actions later during the franchise, he cares more about the glory than truly being dedicated. If this is true, then his attempts to protect his race are purely for personal gain.

Appearance: Vilgax is a humanoid creature with a face resembling that of an octopus. He has tentacles dangling in the front of his face, like a beard. His skin is pale green with yellowish spots on his face and tentacles. He lacks any sort of visible ears or nose. He has red eyes.

In his true form, Vilgax more closely resembled an octopus, having the shape of one with many tentacles. He had three spikes on his head. He has gills on his cheeks.