Ken Tennyson is a character introduced in Ben 10: Alien Force.He is Gwen's sister and son to Frank Tennyson and Natalie Tennyson.
History[]
In his first appearance,he was transformed into a partial DNAlien.He was cured by Ben with the Omnitrix.
Personality[]
Although Ben and Gwen describe him as 'the coolest guy around',Kevin claims he is 'less cool than his car'.
Ben 10 UltiVerse[]
He appeared in And So He Returns to welcome Ben into Gwen's house.