One question that has bothered me with all the various fae attacks on Harry over the series is that fae aren't allowed to kill mortals (hence the summer and winter knights) so how comes all these fae can attack Harry, before he becomes winter knight and hence a legitimate target?

I'd always considered that for Lash to exist outside of Harry's head she would need to possess some soul and she got this by taking some of Harrys when she sacrificed herself. It may be that Harry himself (through his unconcious) authorised it, as I don't know whether you can just take and use someone elses soul without it being the blackest of black magic (which would then completely change Lash and negate the point of her sacrifice).

My reading of WoJ was that Lash would be around in the second half of the series, as a ghost or something else, to help him in the nevernever.

Nigel