Benjamin "Ben" Tennyson is one of the main characters in Power Rangers Terra. He is the Green Terra Ranger, the Green Ranger of the Terra Rangers and second-in-command. Before he became a Ranger, Ben fought evil aliens by transforming into aliens himself by using the Omnitrix, earning the nickname "Ben 10", earning a childish, cocky, and arrogant personality compared to his college mate, Martin . However, he is shown to be very kind-hearted and caring and mostly takes his role as the Green Ranger seriously. His elemental power is Wind, and his ability is super speed.