Yeah, I already figured her weird smile out. I don't think, that was intended, but otehrwise, she is just plain cute. You have the same group as me atm btw (Lae'zel, SH, Gale).
This is my favorite pic of her so far:
Yeah she has such an innocent-looking resting face.
I have Shadowheart in my group most of the time, even though it's not optimal to have both Druid and Cleric in such a small team size. But I like having her around.
But back to our characters, I think she looks sweet when seen slightly from the side too: