Gwen Tennyson
General Information
Species Human
Home World Earth
Residence Bellwood
Age 11
Affiliations Team Tennyson
Occupations None
Powers and Abilities
Abilities Acrobatics
Equipment None
Relatives Frank Tennyson (father)

Natalie Tennyson (mother) Carl Tennyson (uncle) Sandra Tennyson (aunt-in-law) Ken Tennyson (brother) Ben Tennyson (cousin) Max Tennyson (grandfather)

Aliases Dweeb (Ben)

Megadweeb (Ben) Sweetie (Max)

First Appearance Animo Park

Gwen Tennyson is the cousin of Benjamin Tennyson in B10: Just The Right Size. She first appeared in Animo Park, the premiere episode of Just The Right Size. She is a Human from the planet Earth.


Gwen is a slightly above average height 11 year old girl with green eyes. Gwen has short red hair held by a blue hair clip, and dark blue shoes. She tends to wear a blue hoodie with a cat symbol on it.


Gwen is intelligent, mature but usually stubborn and smart-mouthed when it comes to talking with Ben. Her quick thinking and good instincts give her an edge in dealing with dangerous situations. Due to her high intelligence, she's a grade above Ben even though they're the same age, around adults and authority figures eh acts this way, but when people get on her nerves, usually Ben, she acts immature and childish, just like him.


During the First Summer Roadtrip when Ben found the watch, Gwen went on a road trip with Grandpa Max and her cousin Ben. She and Ben constantly argued, (like about Ben misusing the watch) and they still do now. How ever they have shown to deeply care for each other. Gwen also shows deep affection for her Grandpa.

Powers and Abilities

Gwen is a capable gymnast and martial artist. She is shown to be quite good in hand-to-hand combat fights against enemies who had normal strength levels. She was part of her school's Jujutsu team.

Gwen does martial arts, horseback riding, softball, skiing and cross country.


Human Physiology — Gwen is still human and can still be hurt, and catch colds, amongst other things.



Frank and Natalie Tennyson

While Gwen's parents, her mother especially, only want her to study and become a scholar, this has made a slight rift between them but it's clear that Frank and Natalie love their daughter and are willing to support her decisions no matter what.

Ben Tennyson

Ben and Gwen are almost always bickering, arguing, name-calling (they called each other "Doofus" or "Dweebs"), making fun of each other, or fighting, and they have a love/hate relationship. However, deep down they really do care about each other 



Love Interests





  • Animo Park


  • In JTRS, Gwen is a grade above Ben.
  • Gwen was the one to name Wildmutt And Ditto, unlike the other 8, which were named by Ben.


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