My first encounter with a square cat was Lilu M. Lilu is a mixed-breed shorthair. She reminds me of a fur-covered cinderblock – rectangular and firm. She has a relatively short tail that is quite muscular. You know when she’s tapped you with her tail, because it leaves a mark.
The Siamese cats seem to all be long and narrow. Siamese, Burmese, and their various descendants all share the “lean and hungry” look.
Athena . . . is not square.
From behind, Athena resembles a bowling pin. From above? Nothing so much as a round mound of meow.