I just noticed the tag fairy_(sao) that was populated some time ago. While trying to figure out what the tag should be used for, I noticed that it's pretty much canon tagging. Simply every character that appears in "Alfheim Online" (alo) gets the tag right now, which means that something like post #7585978 is tagged as "fairy (sao)". I'm unsure if we need the tag at all, because you can just tag all the fairies in SAO as fairy if they appear like that. (like post #6031839)
But if the tag is fine enough to stay, it should at least not be used for "has pointy ears" and "appears in alo".