|| A lot of people don't *seem to* realize that "canon" characters are technically the OC of the creator of the novel/show/movie/comic. Just throwing in my two cents. (No, this isn't a confession, just kinda stating a fact o u o)|
I actually don’t agree with the whole “canon characters are OCs” deal.
There are two different types of OCs— fandom characters and original characters. Fandom characters are characters designed to be integrated into a pre-existing work of fiction. Original characters are independent of pre-existing works. They are completely original, with no ties to any other creative works.
Canon characters are native to existing fiction. They are pre-made, already existing characters. They have established settings, relationships, backgrounds, etc. Though they do belong to the person/company/etc that created them, I would not consider them OCs. They have been, in most cases, licensed and published for commercial use. They aren’t… “original.”
(For example, Tony Stark is a Marvel character and was originally created by Stan Lee. He has been written and re-written by different writers many times over. I would not consider him an OC of Stan Lee, though he is Stark’s original creator.)