Camille Mann-Tennyson

Camille Mann is a Sludgepuppy. The Sludgepuppies are shapeshifting aliens that were apparently at war with the Plumbers. She wants peace on Earth by getting married to the plumber Joel Tennyson. Her Sludgepuppy form is human-shaped, after she met Joel.

Powers and Abilities
Camille's body is made out of a purplish mud-like substance with shapeshifting properties, such as turning into a human being(and presumably any species, it is unknown if she gains their powers too). Other abilities include elasticity, the ability to shape her body parts into anything, and super strength.

Unlike most Sludgepuppies, Camille's true form is a sharp contrast; it is humanoid in appearance but has an elongated head. But it is possible that she might have taken this form as "even ground," as it is shown with monster-like arms at one point. She may have chosen this form out of love for her husband, since she is seen in a regular amorphous form in a flashback.