Maybe the arms mean something? The poses in quire 13 seem to mean something, why not here? Or I suppose it could all be random and therefore not much care was taken.
Or maybe, like the red one at the bottom, the hair is supposed to be seen as covering the shoulder toward the front, so they didn't paint there, and her outfit is really meant to be more like the batwing style of Sagittarius.
Or maybe, like the red one at the bottom, the hair is supposed to be seen as covering the shoulder toward the front, so they didn't paint there, and her outfit is really meant to be more like the batwing style of Sagittarius.