This is my personal hypothesis on what music they would listen to.
Lucifer
Listens to classical music, definitely has a record player in his room which is canon because of the whole TSL record shenanigan. Will listen to some jazz or maybe R&B but won't ever let anyone know that. Is defiantly a sucker for the fifty shades of grey soundtrack but that is absolutely secret and only Diavolo knows because he caught him listening to "Earned it" but was sworn to secrecy. This man finds it extremely entertaining to secretly record you doing something weird or funny or getting angry because he thinks it's adorable or entertaining. Of course you don't know about it but he has a compilation of videos like that on his D.D.D. and he likes to watch/listen to them when he's tired and needs a boost of energy. If you ever found out he would deny it completely. But he thinks you're adorable when you think no one is watching you because you seem so pure and innocent.
Mammon
He has a pretty colorful taste tbh. He listens to loud music loves anything from punk to rock and a bit of metal if he feels like it. Definitely listens to bands like the Arctic Monkeys, AC/DC, Nirvana, and maybe the neighbourhood but that's a different story. He also likes rap and is a sucker for artists like Travis Scott, A$ap Rocky (basically whatever is trending in the charts and is good enough to vibe to). He sometimes listens to sad music if he's in a bad mood usually if he feels neglected by MC or his brothers treat him badly (he's a soft baby). You caught him once listening to Heather by Conan Gray after you didn't pay attention to him the whole day and you had to cuddle him the whole evening and shower him with kisses and reassuring words to make him feel happy again 🥺. One thing you didn't know is that when he misses you he listens to all the voice memos you sent him because he saved them all on his phone to listen to.
Levi
You can not tell me this man doesn't listen to 100gecs and i love him for it. So yea 100gecs and anime intros. Besides that he can vibe to mostly anything and everything that's on the radio he isn't picky. He also has a song that he loves to listen to because it's the song that you say it reminds you of him and you two usually listen to it when you're hanging out together or cosplaying together and making silly videos. He loves to watch those videos when he feels sad or insecure because it reminds him of how happy he is to have you in his life.
Satan
This man has immaculate taste. He listens to classical music and you can not tell me he isn't a big time Harry Styles fan. He just gives off the vibe. He started listening to Sign of the times once and that's when he got hooked. Now he listens to him all the time and that's awesome . Bless his soul.
He once ordered two sets of cat ears on akuzon and when they arrived he dragged you to his room where he asked you to wear them while he put on his pair. He then found you so adorable that he asked if he can take a video and when you agreed he was SO happy, he gave you one of those extremely adorable genuine smiles he rarely gives anyone. That video of the two of you messing around, hugging and kissing
is the second thing he watches or listens to when he needs a boost of happiness or to calm down. You sometimes catch him smiling at you for no reason but it's because that video keeps replaying in his mind.
Asmo
Listens to pop hits and is a die hard rihanna fan. Definitely loves listening to S&M or s*x with me or kiss it better when he goes to bed or puts outfits together. Also listens to Beyonce and Britney Spears.
It's just cannon that he likes this kind of music and you can not tell me otherwise. Won't admit it but had a Taylor Swift phase. Also listens to Conan Gray when he's sad or feeling insecure because he's secretly a little insecure. He likes to go through your playlist and download songs you recommend so you once decided to make him a custom playlist with all the songs you think he would like and he listens to it all the time.
Beel
This man doesn't give a single damn about what he listens to. He listens to anything fun and energetic while he works out. He just searches "fun music to work out to" and listens to anything that comes up. However you were once singing in the kitchen while cooking because you were in cooking duty and he was about to walk in but then he heard you and decided to record. He recorded for like 5 minutes of you singing and the occasional 'oof 's and 'oh no's that were adorable to him. He found you singing and dancing around the kitchen the most adorable thing ever and when he showed the brothers the video they all tried to wrestle or convince Beel to give it to them too but he wanted to have it all to himself so he converted the video into and audio recording too so that he can listen to it. You sometimes find him smiling to himself with his earbuds in while listening to something but you don't know that something is the recording of you singing in the kitchen.
Belphegor
Just like Satan he has an immaculate taste as well. Absolutely listens to punk music or trap goth or emo rap(meaning ghostemane, trippie reed, juice wrld, $uicide boy$ and city morgue). He still listens to my chemical romance and other emo bops from the 2000's. Angsty emo boy vibes all the way. You once asked him to send you his playlist and he did, one day he was walking to your room and heard music and realized you were listening to his music so he started taking a video of you jumping around and singing along but then he though it would be funny to do a jump scare on you and keep recording it. And so he did that but when you realized he was taping the whole thing you begged him to delete it and he did but he secretly had a copy of it saved . Now you're very careful about locking your door and he low key hates himself for it because he doesn't get to see you jumping around like that anymore. Anyways he has that video and he keeps replaying it every night before bed because it helps him wind down before going to sleep.
