Homer is a badly behaved and mischievous kitten who often takes advantage of Oswald's kindness, or simply bothers him with pranks. His background and sometimes even his name depends on the short he appears in. Much like Ortensia's name and background changed depending on the cartoon short. For example. In "Homeless Homer". Homer is an orphaned kitten while in other shorts he is Ortensia's bratty little brother.
A number of kittens with a very similar appearance and disposition appeared as Oswald's cat nephews in the Oswald short "Henpecked" and again appeared as the antagonists in the Mickey Mouse short: Mickey's Orphans.
Appearance in modern comics
Homer makes an surprising return in the Norwegian comic "En magisk jul!" ("Just Like Magic!"). This marks the first Oswald and Ortensia appearance in modern Disney comics outside of the Epic Mickey universe and Homer's first outing in more than 70 years.
Written by David Gerstein and the art by Mark Kausler. It is based and takes place in the times of the classic Oswald shorts from 1927/1928.
In this comic, Homer is Ortensia's bratty little brother and both have a rich banker father called J. P. Whiskers. Homer wants to embarrass Oswald in front of Ortensia as much as possible. His appearance in this comic confirm his name as Homer in the Disney universe.
- Homer the Cat's more mature appearance in Oh Teacher, in which he's the same size as Oswald, looks a lot like Julius the Cat.