Benjamin Kirby "Ben" Tennyson is the titular protagonist of the Ben 10 franchise. He was an ordinary 10-year-old boy until he found the Omnitrix, a powerful watch-like device that allowed him to turn into ten 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.