The TCG is just called "WIXOSS". The first season of the anime, on which most (if not all) of the current images are based (and is currently tagged), is "selector infected WIXOSS". However, the second season will be titled differently, "selector spread WIXOSS". Perhaps we should just use wixoss as the copyright tag (and for qualifying the ambiguous characters)?
Also, I'm wondering if Yuzuki as an LRIG (who is credited in the series as ユヅキ rather than 紅林遊月, and some Pixiv tagging has followed suit) should have a separate tag as yuzuki_(wixoss)? It's a specific outfit, though frankly there are too few images to have much need of it, compared to the likelihood it could potentially spoil people if tagged. If we are going to stick to using the same tag if more images come in the future, I'll just add ユヅキ as "Other names" in kurebayashi_yuzuki. urazoe_iona could be another potential issue here, though it is presently unknown how her name is officially styled as an LRIG.