I think I'm sticking to these color palettes for Abby from now on since they personally look nice while matching Abby's overall look in Belariath. I'm still trying to figure out a good and consistent design for Airy, though, but I like what I did with Gatwo (her pet cat) and Shrunken Pork Chop (Abby's pet pig). I'm not completely satisfied with The Belt of Grey, though.
The style's inspired by the Adventure Time series; I like that I was able to draw each character showing off what their personalities are like IC (albeit slightly exaggerated).
Abby: "Run away!"
Airy: "Yay for strategical retreat!"
Pork Chop: "OINK!?"
Gatwo: "HISS!"
Belt of Grey: *Oh NOO!"
Also, thank you, everyone, for all your comments! And to Hashmulan for her awesome pic.