|Benjamin Kirby Tennyson|
|Powers and Abilities|
Prototype Omnitrix (formerly)
|Relatives||Max Tennyson (Grandfather)|
Gwen Tennyson (cousin)
|Aliases||Ben 10 (hero name)|
|Voice Actor||Yuri Lowenthal|
|First Appearance||Happy Birthday Ben 10: Part 1|
Benjamin "Ben" Kirby Tennyson is the main protagonist in Ben 10: Alien Fusion. He first appeared in the Happy Birthday Ben 10: Part 1. He is a human from the planet Earth, and wields the Omnitrix. He exists in Dimension 10 of Earth-10,000.
After 1 year passed from Omniverse, Ben has grown his bear and has change his clothes.
All events of the original series of Ben 10, Alien Force, Ultimate Alien, and Omniverse occurred in this timeline and therefore to this Ben.