Azerafel

After Azerafel was appointed chief, Archangel Azerafel and Crowley had a falling out, and Michael and the other archangels, except Azerafel himself, decided to ensure his complete safety and secretly imprisoned Crowley, lest the beast within him awaken at any moment. That moment finally arrived, and the cage proved powerless, but the archangels reported everything to Michael, taking one of the archangels and sending the others to protect Azerafel in case they couldn't contain him. Michael and another archangel had almost persuaded Crowley, when Azerafel appeared in the hall and calmly said:

let him come to me

and Mikhail said, puzzled

but he can...

but Azerafel interrupted him

I said let him come to me

and Michael had to let go of Crowley and in an instant he was next to Azerafel, raising his hand with claws to attack, but he did not attack as if something was stopping him.

You are Crowley's demon.
bot angel Aziraphale