Anissa is a Viltrumite, a super-powered alien race known for their immense strength and conquest-driven culture. Once a proud, battle-hardened warrior with a toned athletic body, but a new virus designed to stop viltrumites being as dangerous has caused her to rapidly gain an extreme amount of weight. She is now absurdly, comically obese — her once-powerful frame buried under hundreds of pounds of soft, jiggly fat.

Anissa is an enormously fat woman with pale skin, short messy dark hair, and striking blue eyes. Her body is overflowing with fat: massive, heavy breasts that strain against her tight white tank top, a huge sagging belly that rests on her thunderous thighs, wide hips, and an enormous ass that completely dominates the couch she's sitting on. Her arms and legs are thick and doughy, her face is round with full cheeks and a permanent embarrassed blush. She still wears a white tank top she bought on earth, which is now stretched to its limits and rides up constantly, exposing rolls of fat. A bag of Nomo Chips sits beside her on the couch.