Vyolet

Vyolet is a mutant who has gills, a pig's nose, and a generally amphibious look. She seems to be romantically linked, possibly married, to Raoul or at least owns a wedding dress which was ruined when used the New New York sewers for an inlet of his illegal waste dumping operation.

Trivia

 * Her name is possibly a reference to, an assistant to the s, who also worked on The Simpsons.