The white outfit should still be removed from Kuronushi at least, official alternate costume is expected to be tagged either way, but it’s easily forgotten and, being an outfit with a certain degree of fan recognition, it’d be nice to have a tag for it. Tho it’s unclear how it should be done, since it has no name, and possibly no fan nickname either?
I certainly agree with removing Kuronushi from this, though after a bit of thought and looking things up, the reasons are unfortunately muddier than I realized.
A lot of rather subtle lore items (as in, a combination of a limited-time event, note interactables in Inazuma, and an artifact set's description) seem to associate Scaramouche with the setting of one of the scenes in the Sumeru cutscene I mentioned, where he wore the aforementioned white-vested outfit. This happens to line up with events described in the Irodori Festival, where the things learned about Scaramouche led to him being depicted as Kuronushi.
If it wasn't a name confusion with Kunikuzushi (which is apparently a name Scaramouche picked out for himself, so I'm even more wrong), I might see some logic linking Kuronushi with this costume, but:
- At no point during the subtle lore hints do we actually know for certain what Scaramouche was wearing when all this specifically happened
- The Kuronushi costume already pointed to his depiction as one of the Five Kasen, and having one character tag referring to two costumes is a bit nonsense
- I really doubt a typical user of Danbooru is going to know most of this
That said, when it comes to giving it a proper name, that's a problem I have no good answer to.