@thatdelphox@occult.camp @kara@occult.camp it's shorthand that's useful in certain specialized circumstances:
* fanfic--saying "X canon media character and OC" lets the reader know that it's not all canon media characters, so they know what to expect going in
* art--when soliciting customs some artist specify "OCs only," which means for whatever reason (ethical, legal, artistic) they don't want to be doing pictures of existing canon media characters