Sparkles atop a castle, around 1200AD.
Yes, she's that old. And this is a concept from my new sketchbook, in which I've been constantly penning quick doodles such as this one.
Not sure how much you'd potentially see of this story in the first issue/one shot of the Baen-Shee book, as much as I want to touch on world history with it. The Hound of Ulster is, of course, what this concept is based off of. Very loosely, I assure you... For one -- Sparkles' story takes place in Scotland, not Ireland.