Gwendolyn Tennyson
General Information
Species 1/4 Anodite 3/4 Human
Home World Earth
Residence Bellwood
Age 10
Affiliations Ben's Team
Occupations Hero, Student, Ice Skater
Powers and Abilities
Abilities Enhanced Intelligence
Equipment A Ring
Relatives Ben (Cousin)
Max (Grandfather)
Natalie (Mother)
Frank (Father)
Sandra (Aunt)
Carl (Uncle)
Verdona (Grandmother)
Aliases Lucky Girl
Doofus, Dweeb, Megadweeb (Ben)
Kiddy (Max)
AllKnow (Kevin)
Mrs. KnowAllThat (Ben)
Gwwen (Sandra & Carl)
Voice Actor Ashley Johnson

Gwen Tennyson is a hero in Ben 10 Umut298. She first appeared in The Alien Device. She is a human-Anodite hybrid from the planet Earth.


Gwen is smart and acts like she is the smartest. She is the brains of Ben's team.

Powers and Abilities

She can shoot mana slices. Also, she is smart.


She can be angered with ease and she is really neat, making herself go through some situations, like Ben's cold.




  • Ben: Ben and Gwen argue and battle a lot, but sometimes they are on the same side. Also, they both help each other out in hard times and would not let the other get hurt.
  • Max: Look at Ben's relationship with Max. Gwen and Ben both share the same relationship with Max.
  • Sandra, Carl, Natalie and Frank: Same as Max.


  • Ice Skater Group: Gwen is an ice skater group.

Love Interests

  • Kevin: Gwen will be in love with Kevin in Alien Force, Ultimate Alien and Omniverse.



All Episodes


  • Gwen's favorite flowers are yellow roses.
  • Gwen's birthday is in December.
    • She also has the same birthday as Ben
  • Gwen has Arachnophobia.
  • Gwen isn't too fond of Upchuck's powers. It is also shown on several occasions that she isn't fond of Stinkfly.
  • Gwen has much more control over her mana powers than shown.
  • She dislikes being called an "energy being".
  • Her powers seem to get stronger over time.


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