|Relatives|| Ben Tennyson (cousin)|
Max Tennyson (grandfather)
|Voice Actor||Montserrat Hernandez|
Gwen is a red-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 has blue and white shoes.
Fights with Ben a lot, and is a bit tomboyish. When she is not fighting against him, she tries to help him. Sometimes she helps him and fights with him at the same time. However she is mainly nice to Ben in contrast to the original show where she was portrayed as sarcastic.
- Gwen is 7 seconds older than Ben. 
- Gwen Tennyson (Original Version)