The pictures go back to around late-adolescence years. She definitely shows signs of aging, but if you ask her how old she is, she might viscerally take that 1hp you have, Sans. That said, if anything is there of note, it's a picture of her at a royal recital, playing a beautiful looking pink violin. And then her coming of age ball, where she clearly refused to wear a debutante's dress. All throughout the pictures, she carries more or less the same expression, though, even from the earliest portraits available.