Last Resort AU- Different Characters

So I decided to take a crack at this whole "Anthropomorphic Ponies" with a slightly more realistic touch (and since I can't work digitally right now, I figured I'd upload some traditional work). I wanted to express different builds of a couple of the characters, as well as the reasons why.

From Left to Right:

Sky Stoneheart:
Sky has a relatively strong build for most mares, being nearly six feet tall, Sky is as physically capable as any of her men. Her wings are very long, more specifically built for long-distance flight, and have a bone structure more similar to a bat than a bird (if you removed her feathers, she would still have some capability of flight). The claws on her wings are actually capable of grasping things, however they are not quite as dextrous as her hands (thus why she doesn't use them as often). Bat ponies also tend to have lion-like tails, with some having fins on theirs to stabilize their flight (Sky instead got tail feathers, which she had trimmed down for her convenience. It should be noted that Pegasi have muscles in their lower back that allows them to steer when flying). Sky also has slightly larger ears, is capable of hearing very well, and is also able to see in the dark

Delta Ironforge:
Delta has a relatively slim build, standing at 6'6" he's slightly more average in his overall biology compared to Sky. Delta is a prime example of how cutie-marks work, as not all cutiemarks are on a pony's flank, but can actually be positioned anywhere on the body (such as a forearm, shoulder, hand, etc.). Cutie marks are a part of a pony's coat, and reach all the way down to the skin (the skin is actually colored where the cutie mark is).

"Tune" Lovetune:
Lovetune is an example of a cablu, a pony lycanthrope. While the cablus have no direct affiliations, some have joined the United Republic of Equestria's Military under the rule of Princess Luna (who is considered a goddess to those in Equestria). Cablus (in pony form) will tend to have slightly thicker coats, as well as larger ears. Tune wears bandages to cover scars on her forearms that would give away her cablu status (Cablus are often feared and hunted by standard civilians, however the Military has found their abilities to be highly useful). Cablus are traditionally bipedal in their wolf form, and are intelligent despite their beastly forms.

Due to this being an AU, Sky is not in fact a Cablu.

Love Tune belongs to
Sky and Delta belong to me

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Lemme know what you guys think, I'd love to get some feedback on this MLP AU I'm working on.