Gwen Tennyson
General Information
Species Human
Home World Earth
Age 10
Occupations Hero
Powers and Abilities
Relatives Ben Tennyson (cousin)
Max Tennyson (grandfather)
Glitch (cousin)

Gwen Tennyson is the paternal cousin of Ben Tennyson in the show Ben 10 (Ultimate Reboot).


Gwen is a girl with short red hair, green eyes, and fair skin. She is commonly shown wearing a white shirt under a blue t-shirt with a black cat face on top, light brown shorts, and blue and white striped socks. She has blue and white converse-like shoes. She also wears a blue hairclip to pin her hair to the left side of her face.


Gwen is a remarkably smart and quick-witted girl who is the mastermind behind nearly all of her cousin's plans of defeating villains. She plays an active role as the brains of Team Tennyson.

Although she and Ben have many disagreements, Gwen often finds a way to get along with him. She is respectful and friendly towards people in general, but she is not afraid to make sarcastic comments towards whom she is arguing or disagreeing with.

Gwen is quite forgiving, considering she more worried than angry at Ben for running away.

Gwen can be a bit tomboy-ish because of how she acts and speaks sometimes. Even though she is usually confident about herself, she still has insecurities about not being useful to Team Tennyson.

Gwen has an adoration towards science, things from the 80s and 90s eras, space, and geek culture.    

Powers and Abilities

Gwen is slightly more durable than an average human.

Gwen is remarkably good with technology.

Gwen has recently learned a new martial arts branch.


Even though she's slightly more durable than an average person, she still has limited agility, strength, and thinking.


  • All episodes


  • Gwen is 7 seconds older than Ben.


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