Gwen was created for Ben 10 (2005–2008), in which she was voiced as a 10-year-old by Meagan Smith, with Tara Strong as her future version.

Who is the main villain in Ben 10 Omniverse?

Vilgax Vilgax is the main antagonist of the Ben 10 franchise. He is a tyrannical alien overlord, a Chimera Sui Generis galactic conqueror, the supreme ruler of his planet Vilgaxia and the archenemy of Ben Tennyson, whom he desires to destroy.