Characters of the ImagiNATION

So our show has two main characters, a boy and girl duo, as of yet unnamed. We've decided that the girl should specialize in history and the boy in art. Within the show, their physical form changes, but their 3D puppets are their "true" selves. If they are in a certain painting, the aesthetics of the painting world they enter alters their physical appearance, but they still retain some obvious physical features that distinguish them as our beloved main characters. <3

There will be several other characters in the show too, like the artists they talk to, the characters in the paintings, and the individuals having creativity issues. Alongside them are other characters (imaginauts??) that help out our duo. 

One possible character:

Name: General Aesthetics

Age: 50s - 60s

Bio: Civil war general with an eye for visual cohesiveness! Mustache! White horse!