also think her head looks too big, but still far away from dmd. also compared to the rest of the body, the face has too much "flesh" in it. it seems not fitting to the rest of the body's shape. overall with some imagination, she could be in that age, even though she looks younger
I'm currently working on a game with high school girls in it that all look around the same age as she does. I wouldn't worry too much. She has boobs so she's 10 steps ahead of Elena.
Waaaaaay too old, my man. Knock maybe a foot off of her height, bigger eyes and head, less aged features, and them she might be passable. Blue eyes, blonde/red hair, and whiter skin wouldn't hurt, either.