Interesting. It's a great image, well done. But I'm more interested in what you called it. I don't see very many people using Seraph. Normally calling things of this sort 'angels' or something like that.
Very nice design...minor question about the wings though...are they all at the same level ie 321123 or one pair above the other? I've been trying to work out the mechanics for angelic flight in my mind, but sometimes it seems they fly simply through divine power.
I'm also a mite disappointed that we never saw a Alexander or other holy-based GF in FFX/FFX-2, though Vegnagun sorta comes close.
In my mind, they're slightly offset. Probably not enough to actually flap properly, though. Seraphim are usually depicted with two wings crossed over their head, two spread, and two wrapped around their bodies (purportedly because they're too beautiful for people to look at and your brain would pop.) This one sort of hovers by dint of mojo.