#switch mc

Levi

It's Levi who first kens onto MC's attraction to his more... questionable abilities. He's seen enough hentai to realize what's going on whenever he breaks his form enough and MC blushes in response, quickly closing their legs. He's also got the added benefit of the tail - a tentacle-like appendage that he knows MC loves to ride. It's not a hard leap of logic.

The tricky part is acceptance. It takes time for MC to finally cajole him into using the black, grasping tentacles during sex, and a lot of that involves some heavy tail lovin'. It's not a decision he ends up regretting.

He personally doesn't feel much physically whenever he uses his tentacles, but just the sight of MC figuratively and literally losing their mind while they're being opened up slowly and tortuously by his grasp on reality is enough to drive him wild, spurring him to add more and more. And what is a more perfect reality than seeing MC break just for him?

Asmo

With Asmo, MC discovers that they can use their pact to turn the tentacle apparitions on the demons.

The thing about experiencing a reality beyond your own, is that it's hard to return and be satisfied with what you have. After the first time, MC is hungry for a repeat experience. There's a power in knowing that the world breaks for your pleasure - in your pleasure. And it's selfish to keep that knowledge to yourself.

MC commands Asmo to tear the world apart, and as he does so, the tentacles that grasp and writhe return, twining around you and the space that you share. But with some clever words, those tentacles release their hold and become directed inward.

Asmo's quite experienced in pleasuring himself, but this is something completely new. Because it's him, but he's not in control. He opens himself up under MC's watchful eye, and can't stop himself when they tell him "One more for me. Make it fit." He remakes himself over and over and over and it feels like it never ends.

He, of course, is very willing to return the favor. Something MC would absolutely take him up on.

Belphegor

Belphie tends to lose his grasp on physicality the easiest, more comfortable in that space between waking and dreams. In dreams there's more freedom - it's the only place where mortals can begin to move and shape the world like the Avatars do.

So really, he's not all that aware when his control slips . All he knows is MC is dreaming about him - or are they hanging out? He's not sure. But then they're reaching out and he can't help but reach back. It's not with his hands, but that doesn't matter. Their touch is so warm it practically melts him.

He needs more of that warmth, and he knows his hands and face and his body aren't going to be enough. So he seeks them out with everything that he is and wraps them up completely. But it's not enough.

Those parts of him, mortals would see them as tentacles, they reach and prod and poke until they're inside. He spares a thought for MC's comfort, but they're grabbing for more of him, desperately trying to fit him in their mouth.

When MC wakes, they're not sure whether it was a dream or reality. All they know is that they're sore all over. And filled with more energy than they know what to do with.

Beelzebub

Beel's hunger is never satisfied, but it comes close when MC smirks wickedly before commanding him to take and consume. As he does so, shadowy masses can be seen grabbing and latching onto the shafts of light streaming into the window, reaching up and up and around until those tentacles become the only thing in sight.

The area around MC becomes almost living as the black masses surround them. But take is only the first half of the command.

The return of those tentacles is quick and sudden, and MC makes sure that they're all directed physically towards Beel's waiting and hungry holes. There's very little gentleness as all the tentacles fight to enter him at once, bringing with them the tattered remains of time and space that further fill the Avatar of Gluttony. He's stretched so far around it all, but there's joy and contentment at how much he's able to take and consume.

Beel is drooling around the tentacles in his mouth, even though there's no possible way that his saliva could lubricate the shadowy shafts enough. It's just so mouthwatering, being able to take it all in. It's the most filled he's ever felt.

Satan

For Satan, those tentacles represent more than just his influence on reality. They are what bind him together, filling in those gaps that remain from when he tore himself free from Lucifer. They're close to the surface, even in his humanoid form, and often even a regular human can sense something that isn't right.

There's not even a second thought for him. He sees MC and all the places that are empty, that need to be filled. To him it's a mercy to reach out and and use his influence, those tentacles that cut through the fabric of the world so sharply, to enter, to fill, to heal.

MC coos and praises him for feeling so good, for making them part of him. Because that's what it feels like - a bridge, a connection between your flesh and your soul and his existence. It's an experience you're both willing to repeat, MC practically craving it.

Mammon

Mammon is basically begging to be used by MC, to have his own power turned against him. Normally that's just through pact commands, but he's a greedy thing at heart.

MC asks him for the world and he tries to grant it for them in gems, in gold, in jewellery, and in fine furs and clothes. They're often draped in decadence and yet they demand more from him. They ask him to prove his commitment, what he's willing to take. To bring them the thing that is worth the world to them.

And of course, there's nothing MC values more than Mammon himself. So when they command him, his power has nowhere to go but within. They ask for him to be presented like a treasure, like a prize, and his power reacts accordingly - stretching him out and presenting him for MC's appraisal.

Lucifer

Lucifer doesn't normally manifest in ways that results in the tears and breaks required for humans to comprehend tentacles. He was there when that reality was created, so he knows how to exert his influence in more subtle ways. He knows how to break the fabric of existence in ways that human minds wouldn't know to comprehend, and then stitch it back together at his whims.

That isn't to say it can't happen - just that MC needs to make him lose control entirely. Which is not an easy thing to do with the Avatar of Pride.

It takes days, weeks, of building him up and denying him at the last moment. At first just a squeeze at the base of his cock but then a command through the pact to hold. And hold is such a cruel command, because it's not stop. It's wait - all that arousal not going anywhere, for days and weeks on end.