引用自 thatindiegamer he/him：

Hey I'm looking through alot of the mods and I'm new to modding but I was wondering if it was at all possible to add your own oc, or additonal character without just reskinning/replacing an old one?

not possible because a mod, is an external plugin/model/skin that goes over what's internal so it's physically impossible to add another character to the game, without that character actually existing within the game.