She wore clothes similar to her Alien Force seasons 1-2 outfit, except she now wore long white socks that went up to her knees with black mary janes. In the first season of Omniverse, Gwen still had her ponytail, but it was much shorter. In It's Not Easy Being Gwen, she was seen wearing a grey t-shirt and black running shorts during her morning run. In Inspector 13, Gwen was seen wearing a violet tank with a white skirt and tennis shoes. In Ultimate Alien, Gwen's outfit was similar to her outfit from the first two seasons of Alien Force, but with a red sweater instead of her blue one. In her Anodite form, she looked like a slightly smaller version of Verdona.

In the third season, she wore a red shirt paired with a black vest, gray pants, and black flats.

Her hair had also grown longer and was down to her waist. In the first and second seasons of Alien Force, Gwen wore a white shirt under a dark blue sweater, black stockings under a black mini skirt, and black high heels. Her lucky girl outfit is worn in Lucky Girl and Tough Luck. She wore a pair of white shoes with dark blue stripes. In the original series, Gwen had short orange hair held by a blue hair clip and green eyes and wore a blue raglan shirt with a cat logo on her chest and white capris. Gwen Tennyson is Ben‘s cousin and the second character in the franchise.

Ben 10 omniverse gwen