You don't tag the character just because the subject has their weapon. That's what tags like rhongomyniad are for. You don't see saber_alter or lancer tagged every time dark_excalibur or gae_bolg are in the frame without their wielder. If the fact that the black Rhongomyniad is not specifically tagged bothers you, create a dark_rhongomyniad tag. In fact, I'll do it myself for the sake of consistency.
IMO there's no reason to believe the white jacket is a deliberate heroine_z cosplay, either, it's just a white jacket. Notably, UHZ has a white jacket with black trim, not blue, and the palette here is clearly chosen to mimic Lancer Artoria's original colors.
(Moreover unless you want to put the heroine_z_(cosplay) tag there's no reason to tag the character).
You don't tag the character just because the subject has their weapon. That's what tags like rhongomyniad are for. You don't see saber_alter or lancer tagged every time dark_excalibur or gae_bolg are in the frame without their wielder. If the fact that the black Rhongomyniad is not specifically tagged bothers you, create a dark_rhongomyniad tag. In fact, I'll do it myself for the sake of consistency.
IMO there's no reason to believe the white jacket is a deliberate heroine_z cosplay, either, it's just a white jacket. Notably, UHZ has a white jacket with black trim, not blue, and the palette here is clearly chosen to mimic Lancer Artoria's original colors.
(Moreover unless you want to put the heroine_z_(cosplay) tag there's no reason to tag the character).
then Saber? she could be X or Lancer, and both of them are assassin and lancer