In contrast to Astronov's sweet, kind and sometimes strict attitude, Anti-Astronov is dim-witted, mean and a lazy slob. Anti-Astronov's I.Q., while nowhere near as low as Anti-Wanda's, is still pretty low. Anti-Astronov likes drinking soft drinks and eating junk food. Much like Neptunia, he sometimes, but not always foils plans without knowing what's going on. Anti-Astronov has a few missing teeth and hates being called fat. Anti-Astronov wears an eyepatch because he lost his right eye thanks to one of Foop's antics.
Anti-Astronov has a dark and blue color scheme, like with all the Anti-Fairies, wearing a black crown and bat wings. He has missing teeth and wears an eyepatch.
Anti-Astronov gave birth to Anti-Sunny. Astronov did not give birth to Sunny, instead it was Neptunia.
Anti-Astronov has lost his right eye, while Astronov only cannot see very well with his right eye.
This is made to avoid confusion with Anti-Cosmo, who also wears a monocle.