Yellow omni Retconned: Characters and/or events in this article are removed from the main continuity.

Gwendolyn Tennyson was originally Ben 10,000 and Kai Green's daughter and Ken's sister.


Though mainly given a background appearance (then retconned), we can see that Gwendolyn bears a striking resemblance to her mother at her age, similar with Kenny to Ben. The resemblance primarily consist of a Native American complexion, black hair, brown eyes, and her frail figure. Although she has her long, black hair kept in a ponytail. The outfit she has been wearing during her minor appearances is a blue colored dress with white stripes on it's center. Though by an inch or two, she seems to stand taller than her brother, Kenny. (Possibly meant to be his elder sister).
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In Ken 10, Gwendolyn was seen at Ken's 10th birthday party along with Ken's friends.



  • In Ben 10,000, Gwendolyn appeared during the battle with Vilgax. This was probably an error as Ken 10 is set 12 years after the episode, so she would not have been born or would have been a baby.
  • Gwendolyn and her brother were named after Ben's cousins, Gwen and Ken.[1]
  • Ben 10,000 does not have Gwendolyn as his daughter in Omniverse.[2][3]