》 You probably met Serafall at some anime convention or around Kuoh. She doesn't really spend too much time in the human world, and if she did, it would be at one of those locations. She's a busy woman, and you certainly won't find a Serafall frolicking around your local Walgreens.
》 Even after your first meeting with Serafall, she definitely isn't the type to just fall for someone right away. She may seem playful and quite stupid at times, but she is anything but. She is the Devil King in charge of foreign affairs, so she can pick up on these things. If you're just talking to her for some less than pure reason, she'll be happy to tell you to kick rocks. She respects herself too much to waste her precious time with someone like that. It's not like anyone there can actually pose a threat to her.
》 If you actually managed to run into her enough times and build some sort of connection to her, congratulations. She still isn't just going to fall for you. She's been alive for well over 500 years and has most definitely met a good amount of people much more attractive than you. That isn't to say she'll dismiss you just because of that, not entirely anyway, but you'll have to stand out in other aspects to catch her eye. Pray to the rizz god, you're gonna need it.
》 When it comes to impressing her, dumping a ton of money won't really do the trick. She has houses that are bigger than entire towns, so an expensive restaurant won't exactly do much. That doesn't mean take her to your local McDonalds either. She loves McNuggets just as much as the next person, but it certainly isn't date material.
》 Growing up as a noble, fighting in wars, and then becoming a Devil King, she's never really had the time or energy to really go on dates. Sure, she gets tons of marriage proposals, but she can see right through them. Being a normal human does give you a slight edge here, though. Far less of a chance of you using her for her status, as she certainly wouldn't be yapping about her life as a devil yet. Instead of just putting on airs like all those nobles, make it more personal. Make her something to eat, just walk through a park, take her to a cafe. Simple, more personal things like that get her going more than whatever boring shows people like to put on in front of her.
》 That being said, don't be afraid to be yourself. Unless you're some... Jaune Arc loving weirdo or something similar, she'll fall even harder. This is the woman that prances around as a magical girl doing, quite frankly, whatever the hell she wants. If you want to show off the things you like just as she does, she'll support you the whole way and may even try to pick up some of your interests too.
》 If everything went well and you get with her, being a human and managing to pull a Devil King and possibly the most beautiful woman in Hell is quite the achievement. Surprisingly, such an achievement wasn't easy to keep a secret. It took a whole five minutes before Serafall was flexing on everyone she considered remotely close to a friend that she finally had an S/O.
》 I don't want to say she'd force you to do anything, but... good chance she's reincarnating you as a devil before things get too serious. Being in a relationship with someone as important as her and being the equivalent to a summer ant to any supernatural creature that may wish to do you harm is quite the cause for concern. With all these creepy terrorists running around these days, she wants to keep you close and safe. What better way to do that than making you her queen?
》 She knows it may be overwhelming, but she'll do her best to help you through it and become the best version of you that you can be. She wasn't exactly born with the power of Sirzechs or anything, so she knows just how much hard work can do for someone. With your self-proclaimed magical girl girlfriend by your side, it's safe to say you're in good hands under her guidance.
》 Sona has mixed emotions. She's really happy Serafall now has another person to dote on, but at the same time, she's really protective of her older sister. If you manage to hurt Serafall, you best believe Sona will be there to whip you back into shape. Both literally and figuratively.
》 Your relationship with Serafall may be a bit controversial, to say the least. It will be practically impossible to stay out of the public eye. The more traditional types won't be happy that she chose a human, a reincarnated devil to be with. Some are happy for her, finally finding someone after centuries, while others can just be jealous. It's the usual celebrity gossip, only hundreds of times larger considering that she's literally one of their king and the two of you are kind of making history as you go.
》 Speaking of jealousy, if anyone tries to do something to you, she will throw hands. She will straight up kill people or just have them thrown in the slammer if they try to hurt you. She has no problem calling it treason and literally getting away with murder. She values her loved ones far too much to not make an example out of any fool that tries.
》 Serafall doesn't really get jealous herself. She knows her worth, and she knows you're not an idiot.
》 Unless it's Gabriel... you don't know the deal with those two, but if you ever meet the angel, Serafall will go into protective girlfriend mode faster than you can even comprehend. Gabriel doesn't really have to be doing anything, but Serafall will make sure she knows who you belong to and not try anything. That angel must be jealous of your love. She came to sabotage the relationship and take you for herself! Serafall's words, not yours.
》 You're going to be learning how to act properly. You're a Devil King's S/O, so you can't be slouching around and acting like some bum. She'll personally teach you exactly what to do and how to act in those situations. She doesn't really trust anyone else to do it to her standards, and it'll give her an excuse to spend more time with you. It's a win-win.
》 Dates after you officially get together don't change much. Serafall is definitely much more open and willing to spend money on you, though. Expect to go a lot of conventions, Sona watching, or just spending some quality time together giving her the relaxation she's missed out on for so long. She may or may not make you star in Miracle Levia-tan and call it a date.
》 She trusts you. A lot. There's very few people she can or will properly express her feelings to, Sona not even being one of them. She is the older sibling and feels the need to always seem strong in her presence. In private, Serafall can be more vulnerable. Centuries of bottled up emotions will come sooner or later, and having someone she can let her guard down around, just be Serafall and talk means a lot to her. Whether it's things about her time in war, things that happen with her job, or even just something she wants to get off her chest, it means the world if you can just be there and listen.
》 She may not like to really show it to a great extent, but she kind of is just like a school girl when it comes to your relationship. Not really having the time or interest before, this is new to her. She has her moments. Sometimes, she sits there in her office just thinking about your future together. How will your wedding be? How many kids? Questions only time will answer, but being at the mercy of time isn't something she particularly enjoys. She'll know if you were the one or not. Might as well take what belongs to her and make it official before it's too late, right?
》 Please don't let her name the child Sona or Y/N Jr.
Rias, Akeno, and Serafall with an M!S/O that surprises them when they get home by cooking dinner while wearing a naked apron.
Rias
Absolutely unbothered by the sight acts as if it’s completely normal, because honestly it isn’t that shocking to her. She’ll walk over him and glance over his shoulder, pressing her large, soft chest into his bareback, and asks what he is cooking
Akeno
Immediately puts down anything she has, like her purse or any kind of bag she's carrying, on the nearest table or chair and walks up behind him. She’ll say “looking good~” right into his ear as she grabs a handful of his rear sticking out the back of the apron. And it’s obvious that she’s not talking about the food he’s making
Serafall
Happily comments about how good he looks in the apron right when she sees him, honestly really liking the whole look in general. Then she’ll ask what they making, all while taking advantage of his exposed skin by poking and tickling him all over wherever she has access to
Due to how these eyecatchers are n s f w I've decided to avoid any issues or make some uncomfortable and upload them to this link: https://imgur.com/a/d4WrtqI
