Hmmm, Eladrin might work better than Tiefling for sure, though there'd need to be some reason for him to try to shift his focus from the Feywild to the Shadowfell. I like the flock of ravens idea as well; he'll probably pick up some wizard abilities related to cold and freezing so as to better emulate some of her peripheral focus (W&M refers to her having ice and frost in her portfolio, and that she lives in a "Castle of Black Ice" deep within the Shadowfell).
It also makes quite clear that she's neither good nor evil, but decidedly remote, cold and in some ways unknowable. If he were to survive into the Epic levels, I'd have him angling along an Epic Destiny that would end up with him achieving the title of "Consort of the Raven Queen," even if it meant that he'd have to find some way to purge his own name from the history of the world.