I say give her a gas mask, a flak jacket, and anything else. functional and scares the living shit out of anyone that gets surprised, especially if he eyes glow and the rest is all black.
In regards to Tsuki222's idea that would be fun. Maybe Ariel is secretly Chiri's rival in the magical girl world. I'd like to see her hair put up like Khal'harror's when he snuck in with Chrys' crew to the school, though I'm not sure it's totally possible with her hair length.
Really hope this gets enough attention to be continued. I think Faen should dress up Ariel in a dress with one of those really wide skirts and a magical girl rod.
On the other hand, I don't know what outfit to dress her up in... maybe other than a maid outfit. >>
Magic girl outfit FTW! They automagically change shape to fit the girl in the case of spontaneous transformations.
Faen is so nice to our Little Wolf :3