Those of you who have seen my Auria Expressions picture will recognize this as an "emotions concept piece", where I try to draw a single character in a series of different emotional states. It's good practice to draw the same character many different ways on the same page. I find it builds consistency and better understanding of proportions and expressions in general. One artistic reason for giving many fantasy races (not just elves) large, pointed ears is to give the viewer an additional visual cue towards the character's emotional state. Elven ears can be a very subtle yet effective means of expression. So far as the character goes, there's not much to say at this point. She is a half-breed princess (not actually half-elven), and that's all I can really say right now.