Little idea of Raven being co-linked to the principals changes to keep up. So when Celestia gets a dildo chair and a 2.25 boost, Raven changes as well with much thicker lips and long long tongue to do things ot the principal a chair like that couldn’t. And of course when Luna changes Raven will undergo more change as well to keep up. Possibly gonna give her oiled skin to look like a sex-doll.
 
Honestly loving how she started out as an insecure introvert and ends up as a total freak of a bimbo.