Ben Tennyson: Main Hero== Ben Tennyson had a good life, even a future until Frank Tennyson came along. Because Frank wanted a son he forced Kevin Levin into building a robot duplicate of Ben, but accidently made a ugly, stuffy nose version of Gwen instead! When Ben discovered it was Gwen behind all the villainy in "Ben 10: Alienforce", and "Ultimate Alien" he destroyed her. in the process he found out about the Robot and it's duplicates.
He is voiced by Cam Clarke in this series.
After realizing Gwen is an alien robot, he destroys the main robot in past. The event took place in a sigment of "War of the Worlds".