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|Relatives|| Natalie Tennyson (wife)|
Gwen Tennyson (daughter)
Kenneth Tennyson (son)
Max Tennyson (father)
Carl Tennyson (brother)
Sandra Tennyson (sister-in-law)
Ben Tennyson (nephew)
Vera Tennyson (aunt)
Gordon Tennyson (uncle)
Joel Tennyson (cousin)
Camille Mann-Tennyson (cousin-in-law)
|Alias|| Gwen's Dad|
Uncle Frank (Ben)
|Voice Actor||George Newbern|
|First Appearance||What Are Little Girls Made Of?|
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.
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)
- Frank and his brother, Carl, were both born human, as neither of them have "the spark."