Originally Posted by
Mieck
But the Lore Book explicitly talks about House Galvus being a prominent family. For an established house to be an elaborate fabrication is a massive leap - and there are too many weak links; there would be whispers of the illegitimacy of House Galvus, rumours of power behind the throne, and everything we've heard out of Garlemald prior to 4.4 doesn't back this up, in my view. The Lore book is effusive in its praise for Solus, in fact; he is credited with reshaping the military around warmachina, and this is what gives them the edge against their neighbours. "...[he] was a self made man, and history will remember his success."
I think it points to an Ascian wearing the meat suit of a well respected, up-and-coming member of the establishment from a good family, or simply that he became an Ascian, though that would imply ability to manipulate aether that pureblood Garleans (another thing stressed in his EE profile, page 178) lack. At what point that happens is open to interpretation, but my view is that Solus existed as a boy and man for a number of years, until possessed.