Malleus doesn’t often go on sleepovers, or any social event, he hardly ever even gets invited to them…

So when you, the intriguing prefect of ramshackle dorm invite him to sleep over, he is certainly interested

being a little less than well versed on human interactions, he knows little of what this “sleep over” activity is. “Is the child of man requesting to sleep with me?”

Malleus: knocks on the door to your dorm Child of man. I have arrived for this, “sleep over” you speak of.