thinking so much about the one and how alessian mythology would work... akatosh is the Greatest Facet of the one, and is the closest to encompassing what the one actually is, thus he is the spirit who founds the empire (through his champion alessia) to allow the cyrodiils to understand the one. shezarr is the only other spirit that we've seen directly acknowledged by the order, specifically as being "singularly misplaced, and so doubly venerated" i think the idea could be that shezarr is like, the missing piece of the one that resides within the world/within man, but even though he's "misplaced" he's still Part of the one, along with akatosh, and their duality encompasses the sort of Everything that is the one, it's all very anu/padomay, except more like anu before anu split into anu and padomay