Frank Tennyson

Frank Tennyson is the husband of Natalie Tennyson, the father of Gwen and Ken, the brother of Carl Tennyson, and the son of Max Tennyson and Verdona.

Appearance
Frank wears glasses and has thin brown hair. He wears a smart polo shirt with a burgundy sweatshirt covering it. He also wears tan trousers.

History
He was introduced in What Are Little Girls Made Of?. When Gwen told him about her powers, he said he hoped that the day she met her grandmother would never come.

He apparently already knew about his father's life as a Plumber. He does not have the "the spark" that his daughter has and that gives her her powers; however, in the episode What Are Little Girls Made Of?, Verdona states that he always knew when she was eavesdropping on him while being invisible to the human eye. He initially assumed that Gwen was going out with Kevin Levin without telling him or her mother, much to their embarrassment.

Ben 10: Alien Force

 * What Are Little Girls Made Of? (first appearance)

Trivia

 * Frank and his brother, Carl, were both born human, as neither of them have "the spark."