|Abilities|| Mana Manipulation|
|Equipment|| Charm of Telekinesis|
Staff of Ages
|Relatives|| Max Tennyson (Grandfather)|
Ben Tennyson (cousin)
|Alias|| Lucky Girl|
|Voice Actor||Ashley Johnson|
|First Appearance||Happy Birthday Ben 10: Part 1|
'Gwendolyn "Gwen" Tennyson' is a Human/Anodite hybrid Plumber, the paternal cousin of Ben Tennyson and along Kevin Levin and Rook Blonko a front line member of his team. Gwen is a recurrent character in Ben 10: Alien Fusion. She first appeared in the Happy Birthday Ben 10: Part 1. 'She exists in Dimension 10 of Earth-10,000
After 1 year passed from Omniverse, Gwen has change his clothes again.
All events of the original series of Ben 10, Alien Force, Ultimate Alien, and Omniverse occurred in this timeline and therefore to this Gwen.