How old is Rosearik Rikki Simons?

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