Emma concentrated hard, her eyes flickering from the paper to the girl in front of her, and back again as the pencil began to fill in the details of the face, the curl of the hair, and the sad expression. It probably took about half an hour, and Emma had cramp before she'd finished, but, she had a very recognisable, if a little rough, portrait.
She sat back and sighed, massaging her hand, "I think that's the basics, what colour are your eyes? They seem to shift, but that could be the light, from blue to grey and back again via green? I'd like to get them right, so they're definite?"