Ken Tennyson is a character introduced in Ben 10: Alien Force.He is Gwen's sister and son to Frank Tennyson and Natalie Tennyson.


In his first appearance,he was transformed into a partial DNAlien.He was cured by Ben with the Omnitrix.


Although Ben and Gwen describe him as 'the coolest guy around',Kevin claims he is 'less cool than his car'.

Ben 10 UltiVerseEdit

He appeared in And So He Returns to welcome Ben into Gwen's house.

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