Lucifer wears black silk pants and surprisingly doesn’t wear the matching shirt very often (he gets too hot). If he has to get up, he puts on a blue silk robe. He also has to wear glasses right after he wakes up because his eyes are old and needs to adjust before he puts in his contacts.
Mammon, if he’s not sleeping naked, he’s wearing grey sweatpants and going commando. Has no problem walking around w/out a shirt on. If he’s had a restless night, he’ll have some bedhead. Also technically needs glasses in the morning but would rather give up Goldie before admitting that and wearing some.
Levi prefers dark sweatpants and a fandom hoodie. Bro gets cold really easily and has a really bad bedhead. Also tends to have dark circles under his eyes.
Satan either wears nice silk pajamas that are cat-themed (of course) or light sweatpants and a T-shirt; it depends on how late he was up reading last night. He also needs glasses in the morning (he inherited someone’s bad eyes).
Asmo wears the most expensive and nice-feeling silk pajamas or sleeps naked (no in-between). Will not wear anything else - anything else will scratch his skin and irritate it and make it break out and-
Beel only wears sweatpants and a slightly dirty, loose tank top. Also, get really bad bedhead. Does not give a shit how he looks when gets up; food first, looks later.
Belphie prefers flannel pajamas, either in a plain or simple pattern. When he has to sleep by himself, he also adds a hoodie—the man low-key looks like he’s been camping. He always gets bedhead.
Of course, Diavolo wears the finest silk pants and no shirt—he’s already pretty warm; being under blankets just makes it worse. He also tends to get bad bedhead (it's kind of cute, though).
Barbatos prefers plain silk pajamas. He is also a glasses wearer, not that anyone but Diavolo and Luke knows. He gets up at 4:30 in the morning or something else ridiculous.
Simeon likes simple but cutely patterned pajamas. He’s a morning angel and gets up early nearly every day to make his housemates breakfast (Luke helps most of the time). Surprisingly, he doesn’t need glasses.
Luke wears either a cute onesie or simple-themed PJs (depending on the season and temperature). He is also a morning angel. Yet another bad bed hair club member.
Solomon exclusively wears dark sweatpants and maybe a T-shirt or tank top (probably not). He looks like death until he has coffee. He really needs glasses, or else he can’t see.