Onyx Rene

Leviathan:

Look, he can barely handle his favorite anime characters dying, so you? Yeah, no, that’s way too much. 

Nothing actually popped up to remind Leviathan of your mortality, it was because of Satan throwing his books all around the house that did it. 

Suddenly, it was all he could think about. How did he not think of this before? 

Leviathan is no Satan though, and he’s certainly not Lucifer. Researching medical documents and trying to think of things to keep you alive longer are a little over his head. That being said, there were some things he could do.

Leviathan dove into his own research that would be within his realm of understanding, studying that humans who have more positive mindsets and who are less exposed to depressing forms of media, may live longer than the average person. This- this was something he could work with. 

Suddenly, you were constantly being invited to his room, Leviathan having a variety of slice-of-life anime for you to watch with him, all of which had happy endings to boot. If an anime was even remotely depressing, he made sure to keep that out of reach. 

Video games? He’s keeping it safe; he’s not risking anything here. If it’s not similar to Stardew Valley, Animal Crossing, Dreamlight Valley, or The Sims (which must be on a good day), you’re just not playing it. Kingdom Hearts if you’re lucky. 

Satan:

Would do an insane amount of research 

Likely overheard the topic on a news segment about the tragically short lifespans of humans before it all clicked together.

Satan, unlike the other brothers, has never experienced death before, so while it sounds silly, he never had reason to think of you dying.

Looks up humans who had long lifespans to see how he can implement those things into your lifestyle.

Books will be littered everywhere (although that’s not really unusual, but what is would be the topic of said books- The Long Lives of Humans, Human Lifestyle for Dummies 101, The Road to Human Immortality, etc. etc.)

This is when Satan learns just how easy it is for a human to kick the bucket.

Heart attacks, brain aneurysms, strokes, seizures, cancer, the list goes on and on and it’s starting to scare him. He didn’t know humans could just drop dead. 

He’s going to start researching curses to increase your lifespan, or at the very least he’s going to make sure you’re careful as hell. 

You won’t even get as much as a cut without him being aware of it; he’s going to hover around and mother hen the absolute shit out of you. 

Try not to get too annoyed with him though, it all stems from good intentions. 

Asmodeus:

He’ll be damned if his shopping partner for life is going to die on him.

Asmo isn’t stupid; if anything he’s pretty emotionally aware. He's known for a long time just how short the lifespan of humans is.

But still, it came in the form of a nightmare. One where he couldn’t save you, despite giving his best efforts. The way you died was tragic, long before your life should have ended. 

This sent Asmo somewhat into a frenzied state trying to find things to keep you alive once he woke up. 

Vitamins, vitamins, vitamins

Humans benefit from vitamins, right? Surely you’d benefit from Devildom vitamins then. If it’ll increase the lifespan of a demon, he sees no reason why it wouldn’t increase your lifespan. 

Of course, it really only gives you nicer nails and shinier hair. 

He’s 10x more intense with your morning and night routines. 

He will be unloading all his facial creams on you, and telling you the benefits of each one and how it might add a few years to your lifespan. 

You want to stay up late at night to finish homework? Maybe watch a movie? Yeah, no, not on Asmo’s watch. 

Your ass is going to bed every night at 10pm, right along with him. You do realize you’ll be getting exactly 8 hours of sleep each night, too, right? 

Beelzebub:

Regarding his trauma with Lilith, it came as no surprise when he started to fret over your well-being. 

Poor Beel saw an article that discussed how tragically easy it is for a human to die. The cherry on top? How they could die from simply overeating. 

Overeating isn’t a concept Beel is overly familiar with (because to him, it’s never overeating), and while he knew most people couldn’t keep up with his eating habits, he didn’t think it could actually cause harm to a human, let alone kill them. 

Grocery trips are now a more anxiety-inducing event. 

He’s suddenly paranoid that any of the Devildom food could and will kill you. Are you allergic to anything? How would you even know? 

What if one day he serves you his favorite boiled dragonhead and you just drop dead at the dinner table?? No, that will never do. 

There’s a list of Devildom foods that he knows for sure you can have without dying, but then comes the issue of portion control. How much is too much for a human? 

Beelzebub swore he would never lose another loved one again, and it’s a promise he intends to keep. From now on, you will only eat what he deems safe. 

You want to try a new food in the Devildom that you’ve never had before? You better get some seriously good convincing skills if you want him to cave in. For someone who only ever thinks with his stomach, he’s surprisingly stubborn. 

Belphegor:

He’s still plagued with nightmares about Lilith, especially since he still thinks it’s his fault. Tack that on to the way he blamed you and the rest of the human race for it? The man is walking trauma. 

 Like Asmodeus, this was brought on by nightmares about you dying. Different from Asmo’s, however, you usually died by his hand. Naturally, considering your tumultuous history. 

Belphegor, unlike his brothers, takes a different approach. He just doesn’t approach you at all. 

What better way to keep your lifespan long than by staying away from you altogether? 

Is it something that he wants? Of course not! But how can he trust himself to never hurt you again? To never kill you again. 

He can’t. 

So, he locks himself away in his room, sleeping most of the day or just avoiding the areas you normally like to lounge. 

On a normal day, almost everyone in the household, including yourself, would notice this behavior change. However, since you’re now being cornered by all the brothers and their concerns about your lifespan, it’s easy for Belphegor’s absence to slip your mind. 

This hurts Belphegor, but at the end of the day, he believes this is for the best.

Lucifer: 

Lucifer didn’t need a reminder of your short lifespan; if anything, it’s something he’s thought plenty about. 

Lucifer has trauma, we all know that much. After Lilith, he’s absolutely terrified of losing another loved one to something outside of his control.

And your lifespan is not something that’s out of his control. At least not how he sees it, anyway. 

If you thought he was overbearing or overprotective before, brace yourself. He’s going to step it up several notches. 

No excess of junk food, no more pulling all-nighters, no more sitting around the house gaming all day, and definitely no more overexerting your use of magic. He’s no fool, he knows the toll your magic could eventually take on your body. 

Honestly? He wasn’t this bad until his brothers started to panic about your mortality, and though Lucifer told himself he was above such nonsense, he quickly found himself taking all the precautions they were taking (and then some). 

—Lucifer... Did ya put' em under my protection knowing this?—

—I just knew it would be as good for them as it would be for you, Mammon...—

You slid into Mammon's bedroom, unable to get to sleep. Insomnia hitting you with all its might. And how could you, knowing that Mammon hasn't returned? You sigh, trying not to let yourself drift away into the deep waters of worry, trying to convince yourself that Mammon's gig might have extended and that he's happily milking the extra hours off the company he's doing this shooting for.

However, not having Mammon accompany you tonight, as usual, is affecting your sleep. When did he become part of your night routine? Did you always fall asleep feeling his presence around you? Comforting you with his expensive scent? Taking you by the hand while you dooze off? Guiding you with his hoarse voice to the land of dreams as you two watch a movie, read manga, or simply talk for hours?

So quietly, you sneak into his room and slide in his bedsheets, cover yourself with his duvet, and hug his pillows that smell so much like him. You surprise yourself thinking about Mammon when you hold onto his pillow, hoping it was his torso and not just a piece of fabric and cotton, hoping it was his slim figure, his well-built abs, his nice pajama shirt, or much better, his bare dark skin that you were feeling with your own hands. Maybe it's time you accept your feelings once and for all.

His smell, impregnated in the whole room, finally has the comforting effect on you that you were desperately seeking for, and as such, you feel your pretty eyelids struggle not to shut down. But you give in, finally able to escape the tiredness of a typical day in the Devildom.

How long it passed since you closed your eyes and fell fast asleep is difficult to tell, so when Mammon finds you in his room, his heart races faster than ever, threatening to free itself from the imprisonment of his chest. Mammon feels his gut fill with what can only be described as butterflies. The giddiness taking over his body, but he endures it, not giving in. The mix of feelings: happiness, surprise, love, lust, and adoration for you; all of them at once.

Mammon also gets in his bed in that cute pajama shirt that you envision him in. Gently, he replaces his pillow in your arms with himself, seeking the warmth of your body, trying to ease his emotions, and finally rest. After all, you too offer him calm and rest with your mere presence.

Mammon thinks about how long you might have been waiting for him and feels the guilt of his actions. Truth be told, he didn't want to come back home after work, afraid of his conversation in the morning with one of the witches he owns to. The evil woman, as a way of torturing him, had revealed him a vision she had:

—So, how's the Avatar of Greed holding up? Let me give you a piece of advice Mammon: you better be aware that you are in love with that human you keep at home...— with a poisonous tone of voice, mocking the demon about his undeniable fate, his well hidden feelings that he, himself, had yet to addressed. She continued —So much for a mighty demon that looks down on humans, that you, oh Great Mammon's soul mate is a very weak and average one—, she laughed.

Mammon felt a huge wave wash him over. A million things flooded his mind. He left immediately, not a single piece of grim delivered to the woman. She could live without it anyway.

That night, right after he came home, money completely spent in a casino that he visited after his gig, Mammon faced Lucifer. It was rare, but when he did, he usually had a good reason. At those moments of clarity, Lucifer secretly reminded himself why Mammon was his right hand and his trusted brother, and he couldn't help but quietly hear his younger brother's rant, usually reasonable. Lucifer felt proud of Mammon at those rare opportunities that quickly washed away as he surely returned to his reckless self in a matter of seconds.

This time, though, Mammon had barged in his office, not knocking the door, tears forming in the corner of his eyes and fury building up in his stomach. Lucifer simply looked up, his eyes meet Mammon's, and he listens, knowing this is not something that will quickly fade away as per usual.

He listens, more than once rushing Mammon to explain himself again and again; until, finally, Mammon drops a hurtful question:

—Lucifer... Did ya put' em under my protection knowing this?—, Mammon's voice is shaky, his hands in fists stressing at his sides.

—I just knew it would be as good for them as it would be for you, Mammon...— Lucifer responded, tranquil. —How could I possibly know something like that?—.

Mammon leaves his brother's office and rushes to his room. And Lucifer sighs, trying to keep a facade of stoic toughness, when, in fact, his heart shatters, divided between his obvious crush for you, mourning his one-sided love, and also, bracing himself, slowly preparing to loose his favorite brother to a human, again. Meanwhile, Mammon meets a sleeping you in his bed, finally giving in to his feelings for you, clear as day once he sees your face.

—Yeah, I love them... Fuck...—.

✨️💖💛✨️💖💛✨️💖💛✨️💖💛✨️💖💛✨️💖💛✨️

Mammon oh you wanna fight?? Then get ready to fight!! he take it soooo seriously and it’s a good excuse to manhandle you just a little bit!!-

Mammon doesn’t work out for nothing ‘n of course he likes to show off for you! He carries you to your bed and even throws you around a little, laughing the whole time!

He’s fully convinced he’s in a wrestling match and even yells some silly slogan he just made up. Of course he still pays attention to every little thing you do, he’d never forgive himself if he actually hurt you while messing around.

Levi doesn’t really play fight- and if you hit him, he thinks you hate him- he’s more into tickle fights where you’re rolling around tangled up together and laughing!!

Tho there is a chance he’ll randomly bite you, it’s like cuteness aggression takes over and seeing skin = bite you in his head!!! ‘n this could absolutely happen mid tickle-fight!! You’ll feel his teeth nip at your neck / arm / shoulder / wherever he can reach, really. He just likes to bites you. you make him happy? He bites you. It’s simple really. Any excuse is a good excuse to cover you in his bite marks.

Satan also takes it way too seriously- he doesn’t want to hurt you! And he doesn’t really have a good reason for why he takes it so seriously….he just likes to play-fight with you.

You couldn’t beat him in a real fight anyways- but like this he can pretend and let you ‘beat him’ !!There’s also something really hot about the way you pin him to the floor, and smirk down at him while triumphantly shouting “I win.” in that moment all he wants to do is sit up and kiss you-

Asmo the first time he almost cries that you absolutely can’t hit his face!!

But after that he’s a little intrigued, and he can’t lie it is fun to toss you around a bit- ‘n more often then not it’ll turn into something a little hotter~

he’ll looks at you with a little smirk on his face and let you throw a punch or two at him. But before your blows can land you’ll hear Asmo’s little giggle as he grabs your wrists, pulling your hands up to his face and kissing each of your fingers before pulling you into a hug, whispering that if you really want to fight……you’ll have to fight naked~

Beel There’s no way either of them will fight back- even if it’s for a joke he’s too afraid he could to hurt unintentionally.

Beel is too big and worried about his size. He thinks whenever he’s touching you, it should be to make you feel good or make you feel safe. Not to play-fight, but if he ever did try it he’ll probably just kinda poke your cheek or just hold his firsts up while he lets you try and hit him. Don’t worry, your firsts feel more like taps to him.

Belphie loves to tease you, joking that ‘there’s just no way your little human punches would hurt him.’

But he’ll still let you try, his favorite part is when you do hit him and he lets out an involuntary ‘oof’ the huge, goofy, grin on your face almost makes him want to smile too-

Your eyes shot open and you stared at him in amazement. “What!?” You gasped and he flinched in shock. He hadn’t expected that big of a reaction.

“What do you mean? Don’t I always tell you, all the time?” You asked, concerned your absence with work was taking a toll on him—he was always pretty sensitive, and as hard as he tried not to, he wore his heart on his sleeve. It broke your heart to see his conflicted expression and you began to panic.

Why was he thinking these things now of all times? You hoped this wouldn’t ruin everything and bit your lip anxiously.

Mammon was quick to assure you that you’d done nothing wrong. He quickly got out of bed and started pacing the floor, trying to get rid of his excess nerves.

“Like…I mean…I ain’t rich…like I’m tryin’ but…” he sighed and finally let it all loose. “Why’d you choose me? Im happy ya did obviously but like, I’m not a prince like Diavolo, I’m not a trillionaire or whatever he is like Mephistopheles. I don’t control time, I’m not the strongest brother, I don’t summon a giant ass fish-snake-thing, I can’t charm entire crowds, I’m not a famous author or heaven’s greatest warrior. Hell, I can’t even cook, and half the time I clean things it ends up worse! Aren’t ya gonna regret it?” You gasped and he held a hand over his chest.

A tear slipped down your cheek and he froze, pale as a ghost.

“Mammon…I will never, ever regret you.”

Mammon’s heart lifted slowly as you continued. “I do not love you for money. I do not love you for power. I do not love you for fame. I don’t love you for a home-cooked meal or a journey through time.” You wrapped your arms around him and leaned into his exposed chest. “Mammon. I love you because you’re kind. You care far more than people realize. You’re both extremely adorable and incredibly handsome. You always think about how I feel first. You might steal your brothers’ things but you’re also the first to jump to their defense and put yourself in harm’s way. You are loyal to your family and your friends. I love you because you are amazing. You’re my greatest support, my strongest ally, my most cherished friend. Everyone else is family to me, cherished family…but I don’t love them like I love you.”

Mammon was sniffling and holding back his tears as he hugged you tightly.

“I-I’m sorry,” he practically wailed.

“What? Why are you sorry?” You asked, dumbfounded.

“The truth is I’m stressed…I’m stressed because,” he blushed and decided to confess what he’d found. “Cause I went snooping through your room and I found the wishlist you made…and I wanted to get ya the perfect ring but…”

Your eyes widened in shock as he groveled.

“But I’ve always been too damn nervous to ask ya what ya like best and even though I’m breaking my back for Diavolo and Barbatos, I definitely won’t have enough money to get you the perfect ring for you! I can’t even figure out what would be the perfect ring because you look good in all of them,” he blushed madly and the room was silent.

You stepped back from Mammon and turned around to head to your bed.

“Huh-Wha?” Mammon was astonished you’d just walk away and became nervous he’d said too much.

“I’m sorry I know I shouldn’t have snooped—“

You held the piece of paper to his face that he had tucked back into the envelope and hidden back underneath your bed.

“This is my wishlist?” You asked and he nodded shyly.

Again there was silence until you shook your head and began to laugh. Your laughter grew louder and you fell onto the bed, clutching your stomach.

Mammon was bright red. He’d never felt so embarrassed.

“H-Hey! What’s the big idea laughin’ at me!”

You shook your head and wiped the tears out of your eyes. “Oh, Mammon…” you giggled and reached back under the bed. You pulled out the gifts you’d wrapped for him.

“Mammon,” you said, making sure he was paying attention.

“Y-yeah?”

“That wasn’t my wishlist.”

Mammon froze, “h-huh!?” He hid his face in his hands. He couldn’t believe he really thought you were ready to tie the knot.

You grabbed Mammon’s hands and he slowly took them away to see you kneeling in front of him.

“It was my checklist,” you clarified and his eyes widened. “I was planning on waiting until Christmas Day but…”

Mammon let out a loud gasp and his hands shook as you held up a small velvet box.

“Mammon…will you make me the happiest person in all the realms and marry me?”

Mammon’s floodgates open and his lip quivered. He nodded enthusiastically and leaned into your arms. The box fell from your hand as he hugged you on the floor.

“Yes! Yes of course I will!”

You laughed excitedly and hugged him tightly. You felt his small wings flap in excitement and stayed there on the floor frozen in time.

Minutes passed and Mammon had finally calmed his heart. He sat back up and pulled you with him. He crawled to reach the box and opened it back up to see the shining golden ring inside embroidered with diamonds.

“Shit…how’d ya even afford this beauty?”

You laughed, “That’s why I’ve been working so hard lately too.”

Mammon chuckled that you’d both had the same objective this entire time and he hugged you again. “Here,” you declare, taking the box back. “Let me put it on your finger.”

Mammon nodded and his wings flapped as you slid the ring onto his finger. It was a little big but with a few words of sorcery, it fit like a dime.

Mammon grinned, blushing madly, and began laughing. He jumped to his feet and ran to the door beckoning you over, “c’mon! We’re showing everyone right now!”

“On one condition,” you grinned and he nodded, waiting to hear it. “Introduce me as your fiancé.”

He turned redder than he was before and nodded quickly as he grabbed your hand and pulled you out the door behind him.

“Hey idiots wake up! Guess what, you were so wrong!”

~Fin