Gwen Tennyson has grown out of her tomboy phase and is now a confident teenager. Along with that, her abilities have been aged with her too. She can manipulate natural energy to make tentacles, and shields, and powerful blasts with her hands. Kevin Levin has a crush on her, but he would not admit it. She, however is much more open about her crush on him, to the point of asking why he hasn't asked her out yet and was annoyed when he says "don't push me". In "What Are Little Girls Made Of", she give him a kiss on the cheek. During season 2, Ben reveals to Kevin in "Save the Last Dance" that Gwen likes yellow roses. She is supposed to go to her school dance with Kevin, but later misses it because of Big Chill's large appetite. In the end of the episode, she and Kevin dance together outside by his car.

In season 3, Gwen changes her outfit, now wearing a red shirt and a black vest with gray pants. She also keeps her hair in a ponytail. Gwen and Ben's love-hate relationship has returned due to Ben's cockiness over having defeated the Highbreed.

see also: Quotes, Images