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

In Ben 10,000, Gwendolyn appeared during the battle between Vilgax, the 10-year old Ben, and Ben 10,000. The reason for this is unknown as Ken 10 is set 12 years after the episode Ben 10,000 so she would not have been born or would have been a baby.

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

In Ben 10,000, Gwendolyn appeared during the battle between Vilgax, the 10-year old Ben, and Ben 10,000. The reason for this is unknown as Ken 10 is set 12 years after the episode Ben 10,000 so she would not have been born or would have been a baby.