[@BurningCold]Summoning the same Dremora each time would probably be far too strenuous of a thing to put on the mind. Probably why summoning lesser daedra like atronachs is a somewhat less advanced skill, and summoning a familiar is always default a wolf spirit- taking something's spirit that's already pre-disposed to domestication and following orders.

I could spit the shit about the theory of magic and how it works all day, but because I'm wary of people making bad fanfic tier gimmicks in their CSs- 'I have a literal demon from hell as my bff, guys', let's just settle on plucking a different consciousness from Oblivion each time a Dremora is summoned.