If we aren't using the idol tag for people, then it could work alright to merge the tags together since non-idols wouldn't be tagged idol for cosplaying an idol's casual outfit. I'd been meaning to make a list of music series or list of idol series or something, maybe I could make that to cover what series have idols to broadly cover the other concept.
The only thing I wonder about is what to do about stuff like swimsuits and plain school uniforms in the cases where those are idol outfits.
feline lump said:
Keeping it as a separate tag seems like overkill when "idol clothes" is such a vague concept. At a glance, there's not a lot obviously separating post #3969427 or post #3947201 from arbitrary characters like post #3981277 or post #3977202.
There are certain types of designs and elements common to idol outfits, so much that people can tell it's supposed to be an idol outfit even without reading the description.
Still, even when it's hard to tell, if the tagger is familiar with the character then they could objectively tag a post with "idol" when they're in such an outfit.
Anyway, you would run into this whether you merge the tags or keep them separate.