Gwen Tennyson is the paternal cousin of Ben Tennyson.
Gwen is a red/orange-headed girl with green eyes and wears a white shirt under a blue shirt with a cat face on it. She wears brown cargo shorts and wears blue and white striped socks. She also has blue and white shoes.
She is mainly nice to Ben in contrast to the original show where she was portrayed as sarcastic. She fights with Ben a lot, and is a bit tomboyish.
- Gwen is 7 seconds older than Ben.