Benjamin Kirby Tennyson, better known as Ben or Ben 10, is the main character in the series Ben 10, Ben 10: Alien Force, Ben 10: Ultimate Alien and Ben 10: Omniverse.

He is first introduced in the pilot episode And Then There Were 10, where he finds the Omnitrix and then, through the series, learns to use the powerful alien device, including the responsibility of using it, to become a true hero.


Story :

Ben was originally a 10-year-old boy, who grew up in Bellwood, and was unpopular and downtrodden at his school. However, his life changed the day he went on summer vacation with his grandfather, Max Tennyson, and his cousin, Gwen. Shortly after they left Bellwood, Ben went for a walk through the woods they had been camping in, and witnessed a strange capsule crash from space. This capsule contained the Omnitrix, a powerful watch-like device, which attached itself to Ben's wrist. Scared at first, Ben soon discovered that, using the Omnitrix, he was now able to transform into ten super-powered alien creatures.