Wait, what? You're going to move in with it? With the demon? How are you even going to get past the bars of the cell? Oh, they're demon-sized and you're quite a bit smaller. But now what? I guess you don't need to find the tent if you just live here, and I guess it's not technically being imprisoned if you can leave anytime you want. Well, in any case you do move in, and you and the demon end up developing a pretty amicable coexistence in a roommate kind of way. Sure, you have some disagreements here and there, but in general it's just nice to have someone in your life.