I see her as a warrior or some kind of tough-girl who finds herself conscripted into a demon breeding program. Maybe she's tested and is found to be very compatible or maybe she is chosen by a specific spirit.
This looks interesting. Hopefully this is a continuation / expansion of the following similar themed comic pieces from the Miscellaneous Comics section:
Gawd dawm! This is some hot, hot, hot work here. I could watch it for hours and lose myself in the rise and fall of her tits, the flutter of her eyes and the moves of her hips. The whole gestalt is so good. At least as good as a serious movie. A Pixar-level movie. Top quality work here.
Her form was pulled from his subconscious, primed by the "choose the ideal form of servitude" command. Mistress knew she was getting a new girl, but the specifics were a surprise.
I have an odd feeling we wont be seeing much of mistress after this. Back in Vol. 2, Melody mentioned getting traded up to a man and Im thinking Torrins it.
The next page contains 2 animations that take a lot longer to make than a static page. They're scheduled to be released in parts, first the line art versions, then color versions, then the scripted page. The first line art animation is up here:
She says in the first panel "a bit top heavy, perhaps" doesn't this imply that she didn't know when casting the spell what type of girl her slave would turn into? So were her new measurements random? Or was her new look pulled entirely from his subconscious?