Yetta looks like a regular Gimlinopithecus, her eyes are yellow and she has black pupils. She has yellow and white fur with golden stripes. Her face is grey as well as her fingers and toes. She doesn't have fingernails. She has two golden bolts on the side of each wrist and a golden belt with a thunder symbol. There are also two bolts on her head from which thunder shaped hair comes out. She has an eyebrow-like crest on her forehead. She also wears two calf warmers.
Despite being a crook, Yetta is really polite. She often apologises after attacking an opponent.
In The Final Countdown, she went on a crime spree across Bellwood. When Ben arrived to stop her, she took a selfie with him, planning to show it to "daddy and the girls." Although she managed to evade her pursuers and get to her ship, Ben and the Plumbers caught up, and she was defeated (offscreen) by Shocksquatch.
In The Most Dangerous Game Show, she was one of the contestants chosen to compete for Ben's hand in marriage.
Ben 10: Omniverse
- Yetta was originally supposed to be shown fighting Mole-Stache in No Honor Among Bros, but the battle was cut for time.