Of course!!

I read a fic where Hyde played the piano and I absolutely live for that. Jekyll probably got lessons or something when he was younger, but quickly dropped it on account of focusing on his studies. Hyde though? He ABSOLUTELY whips out some killer ragtime songs at bars (or anywhere with a piano OR reed organ, honestly) when he feels like showing off or bringing up the mood. Like, I imagine him to have the same energy as Will Wood when playing (speed and enthusiasm wise, here's a good video for reference lmao)

On the flip side, Jekyll sings/hums to himself when mindlessly doing things (like cleaning up) and when bathing. Usually Scottish ballads, but he's also picked up some more popular British ones from Hyde. Hyde also sometimes asks Jekyll to sing to whatever he's playing, and if Jekylls in a particularly good mood, with some coaxing, he'll give in.

Jekyll had to give Hyde his own little journal so he would stop defacing the journal he kept his experimental logs in. Hyde still uses it, and is actually on his second journal of shitty doodles. He likes to leave it open on pages with mean doodles of Jekyll, or obscene things he knows will make the other flustered, just to get a little rise out of the man.

Hyde has tried bringing some of the nicer street rats back to the society to keep as a 'pet' (he wanted to try and train one to attack and do things he says) but Jekyll has thankfully put a stop to that every time.

Jekyll's eyes before the potion were just a really pretty brown and only got that deep red color after. Surprisingly, no one really asked about it because of how his eyes already shone in the light.

Jekyll starts slipping into his Glaswegian accent when he's super drunk or angry (and when he's more sleep deprived than usual). It also slips into Hyde's voice a bit in high stress moments. At one point, Hyde got hit pretty nasty in the head and could only speak Glaswegian for a good few hours. Jekyll forced him to isolate, as to keep it a secret, and led him through brewing something to help. He didn't complain much about the few things that got broken, but he did scold Hyde for biting off more than he could chew (and for leaving him with such a horrible headache that he couldn't get rid of).

Hyde is surprisingly clumsy when he's not roof hopping. He's the type of mf to fall up the stairs. I'm also a firm believer that he does that ADHD walk thing where he just twists his body around tables and corners and such, along with drifting a bit while he walks (which has made him bump into many people, causing fights). Jekyll on the other hand? Yeah, he's got that high society gait and is super thoughtful about how he moves, but he also just runs into shit. Generally it's when he's alone and/or working (or super tired and weak), but there have been a handful of instances where he did it around Lanyon or Rachel that he still gets embarrassed thinking about (the bloody nose he had one time in front of Lanyon was not fun).

Anyways, that's all I really have rn, thank you for asking!!! :33