Ben Tennyson (from Ben 10/Ben 10: Alien Force/Ben 10: Ultimate Alien/Ben 10: Omniverse) is the first member and the leader of The Ben 10 Alliance squad, one of the allies of Team Isberto. He is the 16-year-old superhero who wields the immensely strong and powerful Omnitrix. The Ultimatrix allowed his alien forms to evolve into stronger versions of themselves, called "Ultimate forms," which aided him against more intense foes. Children and teenagers adore him, while adults view him with suspicion. Despite his immaturity, Ben's actions are motivated above all by a strong and sincere will to help other people; he'll stop at nothing to protect his family or anyone in danger. Sometimes, his idealistic nature tends to make him act naive.