|Species||3/4 human and 1/4 Anodite|
|Base of operations||Bellwood|
|Hair color||Reddish orange|
|Abilities|| ·Enhanced Intelligence|
·Mixed Martial Artist Expert
|Relatives|| Ben Tennyson (cousin)|
|Allies||Kevin Levin, Ben Tennyson|
|Enemies||Biowulf, Skalamander, I-Bol|
|First appearance|| "Ben 10/Generator Rex: Heroes United" (flashback)|
"Hero Times Two" (comic)
|Images | Quotes|
At some point in her life, she teamed up with Ben, Kevin, and her grandfather and became a plumber.
Gwen accompanied Ben and Kevin to Japan, where Ben would make a commercial for Mr. Smoothie. When she met Rex, she seemed to be impressed by what Ben had told her about his abilities. Later, Gwen opened a portal to Rex's universe for Rex and Bobo to return home.
Gwen is a red-haired girl with green eyes and pink lipstick. Her hair is combed into a ponytail. Her normal attire is a red sweater over a white blouse, a small gray skirt, brown stockings and black heels.
Powers and abilities
Gwen is able to control a pink energy called mana, also known as life energy. She can use this energy to shoot attacks, create powerful force fields for herself and others, and open portals to other dimensions.
- 310-311. "Ben 10/Generator Rex: Heroes United" (flashback)
- Gwen Tennyson page on Ben 10 Wiki.