I was gonna make an obey yan blurb request, but after thinking on it, it would be pretty scary to have any of the demon bros have yandere tendencies towards you. Like pact or not, idk how much a simple command would help with keeping them in line or in check, esp if you have no magic 😅😅😅
These old, ancient beings, the were formed with the creation of the universe and hold unimaginable power that can bend the universe to their will and even then their goal is to just damn us all to hell and give a big old fuck you to the Sky Daddy™
I'd be... Very compliant to say the least. Yeah, in the game they can love and such, but thinking about it you're so fucked- pact or not. A pact gives you a little more control over them, and direct access to you and your soul, and even then they know how to use pacts inside and out. They know every loophole and how to trick you into being completely theirs.
In all honesty, unless you're ready to pack up and become a priest or nun, and even then that might not work, and live on holy land for the rest of your life, praying you don't go to hell because if you do you're completely theirs for the rest of eternity.
They don't care for human morals, and since they are centered old, they can be patient. Soon, you'll be hundreds of times older than your entire lifespan on Earth, and spending all that time in Hell will wear your soul down- and you don't have the safety of a human body to shield yourself from the trauma anymore.
Soon, a simple date would be damming sounds to hell and torturing then for a couple years before going back in time to torment the oldies or something.
A demon going yandere for you wouldn't be very fun (●__●)