Melissa Fahn is an American actress and singer, best known as the voice of Gaz Membrane in the Nickelodeon animated series Invader Zim, Dendy in the Cartoon Network animated series OK K.O.! Let's Be Heroes, Hello Kitty in Hello Kitty's Paradise, as well as voicing many anime and video game characters like Edward from Cowboy Bebop, Neptune from Hyperdimension Neptunia and Rider and her various other incarnations in the Fate stay/night franchise. She starred in the Broadway performance of Wicked and various theatre projects in Los Angeles.

Invader Zim is an American animated science fiction dark comedy television series created by comic book writer and cartoonist Jhonen Vasquez for Nickelodeon. The series centers on an extraterrestrial named Zim, from the planet Irk, and his mission is to conquer Earth and enslave the human race along with his malfunctioning robot servant GIR. He is antagonized by Dib, a young paranormal investigator who is determined to stop Zim from succeeding.