Ben Tennyson is the main Character in BenAlien 10.
He has short brown hair, green eyes, pale skin. He wears a black shirt with long white sleeves, blue jeans and black and white shoes. He wears the Omnitrix (BAT) on his left wrist.
He is the wielder of the Omnitrix (BAT), that allows him to turn into 10 different alien forms. When transforming into an alien, Ben gets all the creature's features, including its appearance, voice, all of its unique and special abilities and powers, strengths and weaknesses.
Ben's main ability with the Omnitrix is also his main weakness. Whenever the device times out, Ben is left powerless until he either dodges or switches to a new alien form. Ben has an allergy to peanuts and has a fear of peacocks.