hmm I always found the tags to be the same as for exaple a face or bodytype and movements. I mean there are only a few charactermodels so as is now you couldn't even tell your own sisters apart if they were standing next to you without a tag or by selecting them.
You just have to keep in mind who you actually know the name of and who you might only know the face of.
Well there are certain people I can (and no doubt everyone else) recognizes a mile away, even without tags. Like indygo matteo... the way he wears no boots, or gloves, and sometimes not even arms, but always is seen sporting leather torso and leg armor.
Hassadria, wears no armor except leather pants, and arms. Its easy to pick her out of a crowd.
Bodacher, typically seen with two large round shields in hand
Unar, also noticed holding two shields, triangle shaped, and wears no arm armor.
Morila, two spike shields in hand, and typically is wearing a battle helmet.
Proglin, one of the few stonebreakers with green beards, he normally sports a chainmail torso, with no armor on hands or feet.
Despite the few distinguishing marks avalible, many characters have made themselves stick out in a crowd, intentionally or not, well I dunno.