How the Brothers Would Try to Corrupt MC w/ Their Sin
I have a headcanon that it's part of demonic nature to try and corrupt humans. Though I think it would be unlikely that the brothers would try to intentionally corrupt MC post-pact, it's still like second nature to them. That means they may try to unintentionally, uh… infect their soul with sin and drag them down into eternal damnation! They don't mean it, but be careful MCs of the world.
One of the hardest things to do can be to make others take pride in themselves… but Lucifer is always ready for a challenge.
The name of the game is praise. The human mind can be easy to manipulate so with enough praise even the most stubborn human will start to believe a drop of their own hype.
Building up pride is a steady thing... He'll usually pick a strength or talent of the MC to give high praise. Perhaps they sing beautifully or they're rather clever, don't worry. He'd let them know.
Light sprinkles of praise steadily increase their self-esteem, which may seem nice and almost healthy at first, but in truth he's laying a trap… He knows how effective his words can be and he's just waiting for them to go to the MC's head.
You think then he would be done right? Oh no. That's not the fun part. What's fun is to then offend that pride he's spent so long building.
He thinks it's cute, really. A small comment here or a little condensation there and they'll get so mad. It's just so amusing!
Of course, he can't take what he dishes, so they'll need to watch out. But don't worry he loves them, even if they're just a little too fun to play with…
Since when does the Avatar of Greed give gifts?
Really, that should be the MC's first red flag. Mammon isn't known for generosity, so when he's spending what little money he can hold onto on them, it's time to raise some eyebrows.
It may seem nice, almost sweet, when he manages to track down a rare vintage of wine for them or take them out to a ritzy restaurant for the night but unfortunately it's all just part of the plan…
Nobody has tastes higher than Mammon. He can't afford them most of the time, which leads to compromises, but given all the Grim in the world he'd be living in the lap of luxury - which is exactly the kind of lifestyle he wants the MC to crave too.
Anyone, no matter how modest, can give into temptation. How easy would it be to taste the sweetest wine or enjoy the most wonderful trip then want to do it again? It may seem innocent at first, but piling on the finer things can soon have the MC craving for them when they pass.
Then all Mammon needs is to make little promises, "If I make it big this time, then we'll go to France!" or, "If I win this next hand then I'll buy ya another glass."
So how many times will the MC give Mammon a pass, then? Will they stop questioning how he comes up with his cash? Will they let him gamble just that "little bit" longer? Will they even join him...?
If they keep getting that taste of luxury, then maybe it's not so bad… right?
You think the easiest way to get the MC jealous would be to flirt with other people since that's how most people go about it but, uh…
This is Levi we're talking about. Casual flirting is pretty much out of the question.
So what is a demon to do to get their hapless human jealous? The answer is, be patient.
No one's perfect, humans especially! They'll slip up eventually…
Maybe someone from back home just got a new car or they're sending out marriage invites.
Maybe they have a friend who's better than them at school or sports or there's just someone who has something they want: Money, talent, looks, followers, friends, you name it. When they see it, he can feel that envy creeping in…
From there, all he has to do is feed it. Let the world poke at their little insecurities for him while he plays the supportive boyfriend!
"Did Mammon really get the promotion? I thought it would have been you! That's so unfair..."
"Satan beat your scores again? What is this, the third time? Doesn't that suck?"
Small little comments… but all with a goal to fill the MC with toxicity...
"Are Asmo videos still doing better than yours? I think I know how to drop his numbers... if you want."
And soon enough, anyone can be an enemy. Everyone has it better than them… so they push the world away in order to feel better. And they become so toxic, the world rejects them in turn...
Except, of course, for their loving boyfriend, Levi.
If you want to keep someone mad, it's best if you're not the actual one doing it.
I know, it sounds counterintuitive, but turning yourself into the enemy risks the target cutting you out. Satan knows this, so he'll never enrage the MC directly...
But indirectly? There's a start.
Everybody has little pet peevs. Tiny things that aren't important, but dig under the skin nonetheless.
Breadcrumbs in the butter, gum-smacking, toe-tapping, tones of voice, or just little annoying inconveniences that can sour one's day...
Satan is well-versed in these tiny annoyances, he'd dare say they're in his domain. And, perspective that he is, he'll know what frustrates the MC soon enough.
Then it's just a matter of execution.
Maybe he jacks with their toothpaste tube or "conveniently" forgets where they put their books... Or they keep mysteriously finding fingerprints on their game disks or seemingly can't keep their room organized to save their life!
It may just seem like the world hates them... but really it's just their demonic lover.
These tiny details and little mishaps will just build and build like cracks in their foundation until it all breaks and comes crashing down… and he'll be right there egging on every moment of it!
You would think that Asmo would have the easiest time tempting the MC into his sin, but that's not so.
Sure, most traditional definitions of Lust begin and end at carnal desire, but what about those MCs who maybe aren't so drawn to the sins of the flesh? Fear not! Because the keyword for Asmo is desire.
Really, Asmo is happy if the MC's mind is full of nothing but him. He wants them to desire him, to love him obviously, but to the point of obsession. His heated kisses and sensual whispers are only means to that end, which can change whenever he needs.
The MC will have their life bombarded by their beautiful demon. It's not an unwelcome smothering, he's among the best boyfriends they could ever hope to have, which is exactly why he’s so effective!
He wants them to need him at every moment. Soon it will feel weird to go places alone without their demon… Certain things they could do themselves, like their hair or getting dressed, they'll want him to do instead.
Of course, if he's able then he'll certainly seduce them as well and at every chance he gets! From the House to RAD and even in the throne room - he's shameless!... But that's the fun, isn't it?
Oh Beel… He's probably the most dangerous one of them all. Not because he's so demonic, but because he's so sweet!
When Beel makes food for the MC or orders them an extra side, he does so with love. He just wants them to be full! ...or so he thinks.
Beel's demonic instincts creep up on even him, he's just not one to really question what or why he does things sometimes. He'll know he has the urge to see the MC eat or just be indulgent… but he won’t know why.
You could actually say it works to his advantage. Whenever he offers the MC another turkey leg or a few more bites of cake, his tenderhearted insistence is often so sweet that they'll just go along with it and try to keep eating… even if they're already full.
Now, the human body can only take so much food at once, but over time it can adapt to changing habits.
Eventually, the MC will find their appetite expanding to catch up… They'll stop feeling full as easily as they used to and soon the bigger portions that Beel gives them will be all but a necessity!
Of course, the worst case scenario is that this doesn't happen at all and they do serious harm to their health by always pushing past their limits… but there's no guarantee Beel's solution won't just be more food anyway.
Belphie is the only brother who will knowingly (and gleefully) try to make the MC as sinful as he is!
It's all for selfish reasons. If the MC is slothful, then they'll want to go out less and (probably) spend time with him more. Win-win if you're Belphie.
Since he's well aware of what he's doing, he's pretty damn effective at it. No other brother will be as committed to meddling with the MC as he is.
He'll convince them to cancel plans or sabotage their alarms so they oversleep. He'll suddenly be unable to sleep without them while his naps seemingly get longer and longer… And if they have something to do, he'll be the voice in their ear saying it can wait!
Really, at any opportunity he can get Belphie will try to drag them down or slow their progress with the sweet, sweet promise of relaxation or a good time...
Sure, it may sound nice at the time - great even! - but it won't take long for their promises to break or deadlines to pile up… Sure, the MC could try to catch up but wouldn't that be too much work? Wouldn't they rather rest instead? Why even worry about it?
It's a seductive line of thought and Belphie sells it well, it'd take only the most motivated MC to resist his charms but like that'd stop him. If he wants the MC for himself, he'll happily put their life on hold to do so. Just go with it... yeah?
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