Can typically be identified thanks to the attire's characteristics: a red and black bikini armor with a red and white cloak, held together by a red and green ribbon (which also feature on her hips) with a small bell, and fake antlers with ornaments at the ends.
May be depicted with her weapon, a silver candelabra with red candles.
Note that it's possible (especially for older artwork), to depict Tharja in a winter outfit without it being the one described above, in which case this tag should not be used.