For the first-and-most-recent-decade-apart-drawings thing. three more to go!
I think Dani's one of the only ones to undergo a sudden change rather than gradual. She was originally white and straight-haired... I gave her a race lift some years ago and it was literally one sketchbook page after a previous-look drawing. Still duotone blue-green hair though because obviously one outrageous hair colour is not enough.
Other than that I sorta merged her with a character that never got anywhere so she's less of a plucky bridge bunny and more of a neurotic gets-lost-in-the-woodwork technician.