Bethezer: Thanks a lot, both of you. :) I was curious if happenings from them are also included in main series.
Well... if we are at that topic - one more question. What about Player Characters from all main series? How much of their exploits are 'solid'? Because, especially for players, joing all the guild they can find is normal. Mastering in them too. But is it canonical?
WingedKagouti: As far as I understand it, membership of some of the various guilds is canonical, but not leading any. As far as Morrowind goes, I believe the Nerevarine is canonically a high ranking member of House Hlaalu (not counting the Hortator title you get from each Great House), but a quick search didn't reveal the actual reference to that.
Every incarnation of the Nerevarine in that time period is technically canon.
