This got too long for an ask.
So there’s probably already fics introducing parents to Mizar/Alcor (or at least there should be, I love me some reaction fic) and they’ll inevitably have a lot of screaming, fainting, holy water and exorcisms as well as better reactions and “Ok kid we trust you” or “We know more about this stuff than you think, I used to get math help from him too”.
But there should also be one where instead of “WHERE DID WE GO WRONG” the parents are demonologists/cultists. So:
“Mum, Dad, I’d like you to meet my girlfriend… Mizar” *brace for impact*
“OMG Mizar I am such a fan can you sign my CD”
“Mum, Dad, you made my bring my maths tutor to dinner, this is Alcor”
“Hail King of Dreams” “Rise, my subject"
Or even better, a demonology professor parent grilling the pair about how they met and how the deals work and berating the kid for wording things badly- “I taught you better than this, you never use a greek binding circle over a latin summons!” “Yeah, Alcor yelled at me about that too” “Damn straight” *Alcor and dad are now best friends*
I have a lot of these. I’m releasing this into the wild before it eats into any more of my time because I have too much to do as it is!