Last night I ran a fun scene with one of my players putting himself into the debt of a Sidhe, and then proceeding to continuously dig the hole deeper.
End result is I used him as an opportunity to dig a new plot line for myself, and forcibly changed his template from 'Changeling', to 'pure mortal', to 'winter knight'. Reasonably sure that progression is completely legal, by the Lore at least.
But now one of the other players, who isn't happy with his character, is wondering if he can roll a white court virgin who becomes the summer knight.
I'm 100% certain that the mantle cannot be passed to a changeling -- the point is to have a human in the position to do what the fey cannot. I'm also 100% certain that the pure mortal template isn't a requirement, because
Dresden becomes the Winter Knight in changes.
I'm tempted to say yes, because this is going to become a hilarious party as a result, but I'm also worried I should say no, because that's going to be a difficult dichotomy to manage -- especially with some of my planned adventures. And of course, there's always the concern of negative refresh if he ever feeds. But my real concern is the lore -- I want to be reasonably consistent with the books, and they don't cover everything as well as I might like. So are the requirements spelled out anywhere? Are there any obvious lore issues I haven't seen?