Archive of Our Own

Lucifer:

• Lucifer’s primary love language would be ACTS OF SERVICE.
• He already spends so much time looking after his brothers, keeping everyone out of trouble, and working hard to please Lord Diavolo, that beginning to look after you would become second nature. In fact, it’s his job to make sure your needs are met as the human exchange student, so making sure that you are taken care of is literally in the job description as he has pledged his loyalty to Lord Diavolo.
• However, it didn’t take very long for Lucifer’s service to you to become voluntary rather than mandatory.
• Though Lucifer would never admit it at the risk of wounding his pride, he would do almost anything to make sure that you were happy, healthy, and/or safe.
• His acts of services range from the smallest acts to the big ones - but they all matter.
• If you’re struggling in any of your classes, Lucifer would be the first to know, and more than likely would be the only one who would actually sit down and help you. If you were feeling physically unwell, he’d be at your side with medicine in a minute. If you were feeling emotionally unwell, you’d be in his arms in a second.
• These acts of service would typically cause you to think you were putting too much on his plate, but Lucifer never fails to remind you how much he cares about you.
• “Lucifer, I don’t need you to come over. You already have a lot going on today. It was just a nightmare. I’ll be okay, I’m just being ridiculous.” “MC, if I thought you were being ridiculous for one moment, I wouldn’t have offered to come over. I’ll be over in a minute - I’m all yours for the rest of the night. I love you endlessly, and I’m always here for you, do not forget that.” *cue a night full of cuddles and backrubs long after you were lulled back to sleep*
• Lucifer’s secondary love language would be QUALITY TIME.
• Lucifer is an extremely busy demon and barely makes time for himself, so if he makes time for you, then you are incredibly special to him.
• I personally think that he prefers spending quality time alone with just you, rather than spending it in public with prying eyes. That way, he could be most himself, and most importantly, have you all to himself rather than sharing you with his brothers.
• Lounging on his couch with a chess board in front of you? Listening to each other’s favorite music together? Simply existing in each other’s arms? Absolutely nothing better than that in his eyes.
• He also really likes having you in his study while he’s doing paperwork - even if you’re just sitting on one of his chairs while he’s working. Although, sometimes, having you in the room while he’s trying to focus can prove to be distracting, so this occurrence is a bit more rare.
• “Y/N.” “Yeah, Luci?” “Can you come to my office at once, please? I have more paperwork for Lord Diavolo than I’d like to handle at the moment, and I would love it if I had something pleasing to look at while I’m busy.” “Of course. Can I help you out with your paperwork?” “That would be lovely, my Y/N. Please come over as soon as you can - I’ve been dying to see you.”
• However, he does absolutely love to show you off in public as well. It’s a pride thing.
• Whether it’s taking you out to an expensive restaurant, laying with you at the beach, accompanying you to the human world, or simply walking you around the streets of…. well, Hell, he knows how good you look at his side.
• A power couple if I’ve ever seen one.

Mammon:

• Mammon’s love language, naturally, is GIFT GIVING.
• Whether it’s Mammon himself out shopping, or if it’s one of his brothers spending the money, Mammon found it hard to shop for himself without shopping for you, too. If he’s out shopping anywhere, he’s always on the lookout for something you may like as well.
• “Hey, human! I bought these flowers for ya while I was out shopping today. Go ahead and thank The Great Mammon for that, MC! Because you’re welcome!”
• Most of the time it’s one of his brothers paying for whatever gift he bought you. Or, even you yourself. But since Mammon is the one who picked it out and handed it to you, it totally counts, right? As long as you don’t question how the gift was paid for, you’re good.
• However, since he’s totally been in love with his favorite human since day one, he finds it pretty much impossible to go shopping without spending his money on you. He just loves your reactions to the things you buy him, no matter how big or small.
• “Well I… bought this for ya because it reminded me of ya, ya know? Because I… I love ya, MC. You’re pretty special to me.”
• I could definitely see him gifting you with clothing and jewelry more than anything, since he’s not exactly uneducated in the fashion department. He totally would give you clothing that he’d love to see you in, or even clothing that would match his. Cringey? Maybe. Does he care? Absolutely not. You’re his human, after all.
• Mammon’s secondary love language would be PHYSICAL TOUCH.
• As I mentioned before, Mammon’s been pining for you since day one. And while gift-giving and spending his quality time with you was always something he could do as friends, touching his favorite human was only a benefit he could indulge himself in once he finally got to claim you as his. So… once he got to touch you in the most intimate of ways, he never got enough of it. Ever.
• Mammon, being the total tsundere that he is, would be different depending on whether or not the two of you are alone, and his touches would be no different.
• If he’s in public with you, his touches would be almost proud and claiming. With an arm wrapped around your waist and your head under his chin, Mammon would proudly announce, “Incoming - The Great Mammon with his absolutely stunning human! Since I’m feeling quite generous today, you can all look at how good we look together. Feel free to thank me later!”
• However, when he’s alone with you, he’s the biggest softie - and so are his touches. A complete cuddle bug, you’re almost always enveloped in his embrace, or vice-versa. He likes to lay with his head on your chest and listen to your heartbeat, but he also likes being the big spoon and encasing your entire body against his.
• Also, consider this: either him spinning you around, or you spinning him around. *sobs*
• Just touch him, or let him touch you - please!

Levi:

• Levi’s love language is undoubtedly QUALITY TIME.
• Levi really values his free time. He canonically loves nothing more than immersing himself into video games, anime, and fiction. So, if he chooses to spend his time with you instead, or if he invites you to do his favorite things with you, then he really loves you.
• Spending time with him is him showcasing all of his interests to you. Often, he gets made fun of for his interests in anime, gaming, and cosplaying, so introducing all of his interests to you in their entirety would be a pretty big deal for him - because he wants to share them with you, not just tell you about them.
• “Listen well Y/N, because I’m going to explain this to you however many times it takes because I’m not dating no normie, got that? The Tale of the Seven Lords isn’t just a masterpiece because of the plot, but also because - ”
• Spending his time doing and watching his favorite things with you just makes it all the more fun for him. You’re his favorite Player Two, his favorite anime binge-watcher, his favorite midnight-premier buddy, and favorite person to accidentally spoil things to.
• Also, if you had any interests that he didn’t share, I think he would be willing to experience them with you as well as long as he got to spend time with you. As long as you take an interest in his interests, he’d be willing to indulge you in your interests, too.
• Of course, with you being from the human world, you have the pleasure of introducing him to your favorite games and anime from your world, too. If you walk into his room with a new DVD set of an anime you like from the human world? Prepare to be locked in his room with him for the next week.
• Levi’s secondary love language would be through GIFT GIVING.
• Of course, his gifts wouldn’t be as grand as Mammon’s would be, but they would be a lot more personal in my opinion.
• Levi’s idea of a gift would be personal items that mean a lot to him, such as limited-edition items, a copy of his favorite video game, a soundtrack from an anime he likes, figurines, a collector’s edition manga, or anything else that he holds dear to his heart from one of his fixations.
• If Levi were to notice that you were really into one of the animes you were watching, or if you really liked the video game that you two were playing together, I think that he would be quick to give you something from his collection if it made you happy.
• “Here, I want you to have this. It’s a limited edition Ruri-chan figurine - only 100 of these exist in the entire world… and, since you love the anime so much, I… thought you’d like it. But, if you break or damage Ruri-chan in any way, I won’t hesitate to ban you from watching The Magical Ruri Hana with me ever again, you got that? So, uh… enjoy, I really hope you like it, Y/N.”
• Initially, I think that Levi would be hesitant to give you anything from his collection, given his envy or even just his general love for fiction. However, upon seeing your face light up the second you realized he was giving you something so special to him, he never became more sure of anything in his life.

Satan:

• Satan’s primary love language would be QUALITY TIME.
• Satan is pretty independent and values his free time to be by himself, very similarly to Levi, so having you around him in any capacity during his free time is his way of showing you that he loves you.
• His main interests being those of books and fine arts, laying in his arms while he reads his favorite book out loud to you or introducing you to his favorite detective show would be a perfect night in his mind…
• ...so much in fact, that he starts bringing you to all of his favorite places that have to do with his interests. You quickly became his companion to his book club, and you take frequent dates to museums and art galleries together.
• “Hello darling, we’re reading the number one best-selling book in the human world in our book club today. I thought that it would feel a bit like home to you, and I think that it would be nice to experience a piece of your world together. Would you mind accompanying me tonight, Y/N?”
• Also, with him being the big animal advocate that he is, I really hope you don’t hate the many little furry creatures of Hell, because you’re about to be visiting quite a few shelters with him. That, and creature-cafes as well.
• One time for one of your anniversaries, you managed to convince Lucifer to let you surprise Satan with a trip to the human world so that he could see more cats than he could handle by visiting animal shelters and going to a cat cafe. It was the one time you’ve ever seen him tear up in your life.
• Much like Levi, I also think that Satan would be pretty willing to take an interest in your interests as well, as long as he got to discuss them with you and have you next to him while he enjoyed them.
• Regarding his sin, I also believe that spending time with you is a good way for him to subdue his wrath as well. When you’re with him, it’s a lot easier for him to control his emotions and keep his wrath in check. You keep him calm and collected, and as his peace, he adores having you around.
• I believe that Satan’s secondary love language would be WORDS OF AFFIRMATION.
• Due to Satan’s respectable and typically composed nature, Satan isn’t one to beat around the bush and tiptoe around his feelings and what he wants to say. If he loves you, or if he’s happy around you, he’s going to tell you just that.
• I don’t think that his words of affirmation would be as outstanding and vocal as Asmodeus (see below), however, I think that he would never hide his feelings from you, since his sin is bred from a strong emotion, after all.
• “Y/N! Thank you so much for coming with me today. Your presence makes me so happy - I really like having you with me, even if it’s just something as small as grabbing a drink. I love you.”
• Also, consider Satan recommending you his favorite books, and upon reading them, it becomes quickly apparent that the romance in these books is how he truly feels about you. It’s not him personally saying these words of affirmation, but he might as well be.

Asmodeus:

• Staying true to his title, the Avatar of Lust’s love language is PHYSICAL TOUCH.
• Asmodeus is a very physical person towards everyone, so if he loves you, he’d definitely be more physical and touchy than anything.
• PDA is a part of the package with him - he’s 10000% into holding your hand, cuddling with you, hugging you, and kissing you in front of everyone, and wherever he wants. He does NOT care.
• When you guys are alone together, Asmo’s just as physical as well. How he acts in public with you vs. how he acts in private with you is a line that blurs constantly. 
• Essentially, there’s always at least one part of his body on you. Whether it’s his hand on your thigh, or his fingers through your hair, or his arms around your waist, or your entire self sat perched on his lap is entirely dependent on the situation. 
• He just really loves the way your skin feels under his fingers.
• “Oh darling! Your skin is just so soft, and… warm ❤. Why don’t you come a little closer so I can touch you in other places, hm?”
• I don’t think that a relationship without touching would work when it comes to Asmo. Of course, I believe that he would be pretty understanding about boundaries and respect when you don’t want to be touched. But the physical nature of his love is a big one - and as long as he’s touching you, everything is alright in the Devildom.
• Asmo’s secondary love language would be WORDS OF AFFIRMATION, though I believe that his primary and secondary love language could be switched.
• Out of all of the brothers, Asmodeus would be the most straightforward with expressing his love and what he wants to say to you through actual words.
• I truly believe that MC is the first person that he has had truly genuine romantic feelings for. Oftentimes, lust and love have a funny way of blending together, and it’s quite easy to mistake one for the other. However, it’s quite apparent to him, and to all of his brothers as well, that he truly is in love with you. 
• Also, if you are truly in love with him back, and you don’t just see him as lust and sex personified? Oh boy, are you going to make this demon melt like putty.
• So, with that being said… he would never let you forget how much he loves you. How could he not let the first person he’s ever truly been in love with know that he loves them every second of the day?
• “Oh, Y/N… my sweetheart, I love you so much. I love you so much that I could hold you and kiss you a thousand times a day and never get bored of it. I want you now and forever, don’t you get that, my beautiful human? Won’t you let me love you forever, please?”
• Just let him give you lots of kisses and tell you how much he loves you, please.

Beelzebub:

• Beel, being the big softie that he is, his love language would be PHYSICAL TOUCH.
• I headcanon my MC as incredibly small compared to Beel, but either way since Beel is pretty big, I think that having you wrapped in his arms would just be the best thing in the world to him because it would feel like he was protecting you.
• ** SPOILERS ** When Beel was dealing with the early chapter grievances regarding Belphie and Lilith, you were a tremendous help to him in every sense of the word. One of the ways you were a comfort to him was through holding his hand and sleeping with him at night, so naturally, he associates touching you with loving you.
• You just fit so perfectly in his arms, okay?
• Beel doesn’t think twice about touching you in public - though his touches would be fairly innocent. He likes having you perched on his lap with his arms around your waist, holding your hand as you walk the halls of the Devildom, or holding your thigh during meals.
• Of course, handsy makeout sessions in the kitchen during snack runs or while you two were making dinner together have been known to happen more than once… (the two of you aren’t allowed to make dinner together anymore, actually.)
• In private, Beel is just as big of a softie with his touches as he is in public. He loves having you lay straight across his chest, even if it’s just to talk and hang out rather than just sleep. However, holding you while you two fall asleep together is his favorite part of his day next to… well, eating.
• “Beel baby, what’s wrong?” “Nothing.” “...” “I woke up and you had rolled over to the other side of the bed, that’s all.” “Oh my god, I love you so much. Want me to come back and we can cuddle until my next class?” “Yes! Come back soon, please.” “And, I love you too.” “Now come back to bed.”
• Shoulder rubs and back rubs are his things, and if it’s you giving the massage - especially after a game or a tough workout - then this demon is going to be getting literal heart eyes for you.
• Beel’s secondary love language would be GIFT GIVING - and it’s a very specific gift he would give to you. If you guessed food, then you’re a thousand percent correct.
• Being the Avatar of Gluttony and a huge foodie, sharing his food with you in any capacity is basically the same as saying “I love you” for him.
• The first time Beel offered you some Super Spicy Devil Fries off of his plate at lunch one day, all of his brothers and you included all stopped dead in your tracks.
• “Hey MC, you want some of my fries? I know how much you like them - so here, have some of mine.” *Cue Asmo choking on his food, Levi and Belphie’s mouth dropping, Satan dropping his fork, Mammon quite literally hollering, Lucifer’s eyebrows raising, and you doing all of the above*
• Basically, you’re the only person in the world who’s safe from his wrath if you touch his food. Anybody else would be on the floor in a hot second. 

Belphegor:

• Belphie’s is the hardest to pinpoint for me, but I think that just like his twin brother, his love language would be PHYSICAL TOUCH - and for a very specific reason.
• ** SPOILERS ** Belpie was incredibly close to his younger sister Lilith. Upon realizing that you’re a descendant of his sister, and the closest thing he’ll ever get to having his human sister back, I think that touching you (in a non-sexual way) would make him feel closer to her.
• Of course, he would like to touch you just for you being you as well.
• Since he’s the Avatar of Sloth, and thus a very tired and lazy demon by default, I think that he would eventually learn to associate comfort and rest with being with you, and would only want to nap or lounge around if you were there to do it with him.
• “MC, I’m tired.” “Take a nap, baby.” “I can’t.” “Why not?” “Because you’re not in my arms, obviously? Come to my room now, please.” 
• You’ve had quite a few arguments about which of the two of you can be the big spoon or the little spoon for the night, because there’s just so many perks with being the big spoon. Of course, there’s perks with being the little spoon, too, so you both let the other win the argument from time to time.
• Having you pressed firmly against him under the coldest and comfiest blankets in Hell is literal heaven to him. He just wants to have his arms around you all the time, okay?
• In public, I think he would be prone to sleeping on you too, since you’re just so comfortable and because he loves and trusts you so much. How many photos are out there of Belphie sleeping on your shoulder in class? Too many.
• I’ve thought hard about this, and I think that Belphie’s secondary love language would be ACTS OF SERVICE.
• ** SPOILERS ** Belphie definitely regrets killing MC - like, infinitely. I think that no matter how hard he tries to forgive himself, or no matter how much MC or his brothers have already forgiven him, I think that killing someone you’d later fall in love with would be a big weight you could never truly get off of your shoulders and forgive yourself for.
• With that being said, I think that Belphie would take special liberty in protecting you and making up for the wrong he committed in any way possible.
• He’d often check in on you and make sure that all of your wants and needs have been taken care of, to making sure you ate breakfast that morning, to checking in on you when you’re with his brothers to make sure you weren’t too overstimulated or stressed out.
• This would be an easy thing to pinpoint - that he was often doing things to overcompensate for what he did to you. However, while it’s true in part that he’s doing these acts of service out of guilt, he’s also doing these things for you because he loves you and wants you to be happy all the time.
• “Belphie, my love, I know what you’re trying to do and I promise you that you don’t have to. Okay?” “Of course I do, Y/N - you don’t understand.” “Okay, so help me understand, please.” “I-I just… just let me do this for you, okay? I love you so much. Just let me do this.” “...” “Belphie?” “Yes?” “You know I forgive you for what you did, right?”
• Belphie can’t take back what he did, but he’d happily spend the rest of your life making it up to you if that’s what it took. He just loves you so much - and if he can keep you happy, healthy, and safe through his actions, then it’ll never be an issue for him.