Definition of Otherkin: http://en.m.wikipedia.org/wiki/Otherkin

Now for the prompt: DB, preferably male and not a Beast race, has always felt "not right" as a man or mer. They've always felt phantom wings, claws, etc. and they find out why when they learn of the whole Dragonborn thing.

Basically I'd like to see DB dealing with the dysphoria, and how it effects how they think, while having to deal with Alduin, the Civil War, and life in general.