|Goal:||To steal the Omnitrix|
|Abilities:||None; Bounty Hunter|
|1st appearance:||Let's Get an Upgrade: Part 1|
|Henchmen/Leader:||The Omega (current employer)|
Xilar is one of the main villains of Ben 10.5. He is about 26 years-old and is from Osmos V, though he is a human.
He looks like any ordinary human, with brown hair and blue eyes, but he always wears sunglasses, so nobody really knows what color his eyes are. He is about the height of Ben 10,000, maybe a little taller even. He has a leather jacket on. Because he was hired by The Omega, he wears multiple weapons to take down several of Ben's aliens.
- Main article: Xilar/Undercover Jobs
He has 20 Omni-grenades (made by the Galvans, are they evil now or something?), a sword, a plasma-wired shield, a grappling hook, and a hoverboard. At times he tends to carry a Proto-Tool.
- Let's Get an Upgrade: Part 1 (first appearance)
- Let's Get an Upgrade: Part 2
- The Hunter's Mark
- Trouble At Sea
- Power Overload: Part 1
- Power Overload: Part 2
Ben 10: Ultimate Power
- Burning Up (first reappearance)
|“||Any last words, Tennyson? I'm collecting them.||”|
|“||The power....I can feel it flowing through my veins! Now, Tennyson, YOU will be the first to feel my wrath!||”|
|“||I am stronger than before, I have learned to control my power! I guess being raised on Osmos V has its advantages.||”|
- Main article: Xilar/Gallery