Benjamin Kirby "Ben" Tennyson. He was an ordinary 10-year-old boy until he found the Omnitrix, a powerful watch-like device that allowed him to turn into 10 different aliens. Though initially immature and clumsy, Ben grew to be a true hero. By the time he was 16, he had become famous in not only his hometown of Bellwood but on Earth and beyond. Ben has also been deputized by the Plumbers and has gained more aliens as time progressed.