User blog comment:Swampman/SPOILERS----- Arisen Timeline/Speculation/@comment-62.25.109.196-20120612123749/@comment-91.152.101.144-20120627140052

I believe the drakes' and wyrms' dialogue hint that you, as the Arisen, the "vessel" as they call you, could somehow become dragon. So in my opinion Grigori could be a former Arisen, perhaps the Seneschal Savan killed. It's left pretty unclear though, just implications here and there.