Quote Originally Posted by Axl View Post
The main thing I noticed is the mention of this character Lord Tristan of House Gisoreux, which I assume to be a reference to the character of the same name from Warhammer. I am currently at work and do not have access to my lorebook, so I could be wrong but I am uncertain that any noble houses beyond the current four are extant. I caution against inventing new houses if you wish to remain truly air-tight with the lore.

I applaud the amount of work you put in to writing the background story though, it was an enjoyable read.
There definitely are more than four Ishgardian noble houses. There are only four High Houses. That does not account for the likes of House Borel and House Valentione, for example.