Add character to Multiple folders

I know *technically* you can just make another full tab for the character but,, I have some characters where they're not different at all and so I don't feel like I need an entire new tab just to add them to another folder, but also feel weird not having them in the other folder(s) they apply to. Can there be an option added to just add a character to multiple folders?? I can't find a way to organize them where I can avoid having them apply for multiple folders.

Edit August 19, 2023: I also thought about it, maybe there could be like- a mode or something for this to work, like a "characters" and "universes" without requiring a world? Idk the world just feels like.. too much in some cases? And I know tags exist, but I use them myself to organize characters by things like gender and sexuality- I don't wanna clutter up the tags with species and stuff, so maybe 2 types of tags would fix the problem?