[quote=Imperfectionist]
Alright, so, correct me if I'm wrong on any of these:

-Wings, powerful enough to carry at least themselves (wing-strength probably varies among individuals; Archangels assumed to have very strong wings relative to the rest)

-Can fly relatively fast overland when unencumbered, encumbrance is based on wing-strength. Regular periods of rest needed, of course. They couldn't fly across Tailteann in a day, or any such preposterous thing.

-Have their own magical traditions, rather like the Elves or Fae, and could have access to Cryptic magic that has been lost on the surface ever since they ascended to their islands (I would give them preference towards the "light" element and healing magic, but that's just me)

-Are somewhat physically stronger than humans, perhaps more on par with the physical races, like the Bangaa or Ronso (Archangels, by their nature, are stronger still, as they are the "cream of the crop")

-Are the longest-lived of the physical races, trumped only by Spirits; in addition, they have a strong immunity against most poisons, diseases and afflictions that originate on the surface (excepting artificial ailments meant specifically to harm them, and ailments unique to them, such as the Gray Wings Curse)

EDIT: The only problem I have with Gabe's backstory isn't the character itself, really, but the portrayal of angel culture and government as exclusively arrogant and such. In my head, I'm thinking that is more the mind-set specifically of the angels who dwell in the Crystal City, not ALL of them (perhaps they are a specific enthicity, the "white wings", who are known for seeing themselves as divine and all that; other types of angels, perhaps with different-colored wings, could be more moderate)
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Wings correct, they can safely descend from the floating isles that would be out of reach of the airships of Fiddare. So they must be strong enough for flight. Magics would be correct, and you even have the idea of cryptic magic down already. (I can recall if i've explained that here or not) And yep again to the Physical strength aspect, they should be strong enough to hold their own and be able to garner some parise, they should trump all without any contest. And yes, longest lived of the physical races, Though a powerful demon could potentially live longer. Spirits and Fae are more or less immortal, all depending on if they manage to keep the will to live in the case of a spirit. Or keep themselves occupied and away from boredom in the case of a Fae.

Edit: If that bothers you, you could always be from a different of the floating isles that 'litter' the skies. As you said, a specific subgroup of angels that his/her angel is from wouldn't be nearly too far fetched for it not to exist.