According to a book she flashed during one scene, her full name is Mary Alice Doombringer.
The star on her face seems to change positions depending on which way her head is facing. Sometimes it is on her left cheek before switching to the right when she turns her head.
She is similar to Mr. Crocker with the exception of more weapons and more "craziness".
She wears "The Punisher" logo on her shirt.
This character looks more like Pokémon Hunter J.
She is officially the last villain in the original series, with the exception of the Jimmy Timmy Power Hour and its sequels.
She looks as if she was ripped right out of Danny Phantom.
She is inspired in-part by Elvira, as Cassandra Peterson is a redhead, while her Elvira persona wears black. Mary Alice's Doombringer side is clearly a cross between Rose "Ravager" Wilson, and The Punisher, while her Sunshine side has a hippie-esque Mary Poppins vibe.
She is voiced by Carolyn Lawrence, who is best known for voicing Sandy Cheeks in SpongeBob SquarePants and Cindy Vortex (who appeared in the special immediately after Ms. Doombringer's debut episode, Jimmy Timmy Power Hour and its sequels) on the show The Adventures of Jimmy Neutron: Boy Genius.