My take on the way canon metaphysics work wouldn't allow this. In both cases (WCV and Fae) one part must be a full 'monster' of the appropriate type and the other parent a human. The child is born with a Choice, and once the choice is made becomes one or the other, with all vestiges of the non-Chosen lineage permanently lost.
Angels are servants of the White God, and powerful to the point that Dresden looking at one with his sight would have screwed him up permanently. And the Fae are terrified of an angel interfering with them. Not even Mab screws around with them.
Angels are not Fae.
Another point to be made, aren't the bodies Fae use in the mortal realm just ectoplasm? Stuff that disappears after they're done with it? Unless it was a male fae, a female fae outside the Nevernever likely wouldn't be able to even BE impregnated, much less give birth to anything.
Anyway, I'm getting the feeling that White Court/Fae conception is something we're going to need a WoJ about, since right now we can only make the best of guesses or theories. And the camp seems pretty soundly split between "not able to conceive", "child couldn't be both", or "child would totally be both."
Another point to be made, aren't the bodies Fae use in the mortal realm just ectoplasm? Stuff that disappears after they're done with it? Unless it was a male fae, a female fae outside the Nevernever likely wouldn't be able to even BE impregnated, much less give birth to anything.
There's an example that may or may not be applicable to this question depending on how you feel about undertown.
In summer knightIf you feel that undertown is a part of the physical world then there's an answer.(click to show/hide)
I would wonder then what you would think would happen if a white court vampire and a fey mated? I don't see any physical reason why they wouldn't conceive (other than the normal ones). What would that child be like?I'm not entirely convinced that anything would happen at all. While there is no concrete canon answer to this, I tend to feel that there are plenty of power-hungry WCVs and Fae out there, enough that if it was possible to create a hybrid WCV/Fae with the powers of both, then Dresden would be tripping over them. I think that Fae and WCVs breed with humans because that is how they breed. Why? Because along with their mortality, they have lost that small spark of creation -- the ability to create new life -- that mortals have but that they can only steal from mortals. Heck, WCVs can't even sustain their own life without the help of mortals, let alone create a new life.
Another point to be made, aren't the bodies Fae use in the mortal realm just ectoplasm? Stuff that disappears after they're done with it? Unless it was a male fae, a female fae outside the Nevernever likely wouldn't be able to even BE impregnated, much less give birth to anything.
"That corpse is still there. It's mostly a burned mess, but it didn't dissolve"
"Yeah," I said. "Faeries aren't wholly beings of the spirit world. They leave corpses behind."