Antonyms of Pronouns


The two Possessive Pronouns

Ours / Theirs

My / Your

What is the type of the Antonyms here?

Gradable, Multiple Incompatibles, Binary Pairs or Converses?


They are not antonyms. The other terms you have indicated are confounding.
I would say that the first two are Personal Possessive Pronouns.
My/Your are Personal Possessive Adjectives.