Lesley: he works in a fish plant at night so... When he gets off work he smells like cold fish and rubber (because of his gloves and apron), but then he also takes care of his garden so it's dampened by the smell of soil. He also has a huge dog so there's a bit of that and occasionally lingering weed. He still uses the same shower products and laundry detergent as his grandparents did so when he's clean he has quite an old fashioned scent but it's usually quickly covered by the rest.

Elov: boysweat and adrenaline, random perfumes he puts on when going through the perfume isle of malls (he likes to put it in the crook of his neck so you'll smell it only when close there), a knack for the spicy and hypotonic ones but sometimes feeling like the fruity sickly sweet scent for adolescent girls. Lingering thrift store smell from his clothes mingling with coppery tints when crimson is still hiding under the sleeves. He borrows the scent of whichever bathroom he uses, motel and stranger shampoos, everchanging.

Wallace: he likes products who's perfume don't linger on him; he almost smells like nothing because of it, just clean skin and hair, even his deodorant and laundry detergents are unscented. His hand cream does leave a faint neutral creamy scent on him. Though since he started cooking more after getting out he does sometimes smells faintly of warm notes of thai spices and freshly brewed coffee. Elov likes him best sweaty, tasting of salt, cum and blood, he calls it his true scent.

Lesley: low monotone mumbles, the muffling makes it sound deeper than it is but it stays in the middle register. Has a scottish accent but sleepy, can make it harder to understand on top of it all since he really eats his words. Tends to croak when he has to speak up, but even then it quickly goes down in volume. Trails off if he has to speak more than a few words.

Elov: It's playfully seductive but drips with mockery. He learned very young that speaking into this slow, sultry tone of voice gets him things so now it's just conditioned into him. It's deep but like female deep, still the one with the highest voice of the three. Cute swedish accent when speaking english.

Wallace: friendly and calm, the tone of an old family friend you can trust. It doesn't sound unnatural /now/ but it used to take much more out of him to fake it. Slightly higher than his natural tone but still in the medium register, think how customer service voices tend to have that little extra lilt in them. Slightly faggoty some would say. His unmasked, natural voice is much flatter, dropping in pitch and staying there. It has been described as cold and even biting, not in an arrogant kind of way but like a stab. It's now tainted with the tiredness of middle age. He has no particular accent until he is in Scottish company, which suddenly makes it come out of the wood.

Lesley isn't quite good with other people when he doesn't have the goal to kill them in the end in mind, he hardly talks and avoids contact so it would be quite hard to get him out of his shell. Man just wants to go back to his rats, dog, garden and computer after work ! Though if you like any of those and aren't too hyper around him that could be a good angle to start with.

Elov managed by being ambiguously suicidal enough to confuse Lesley into letting him live long enough to brute force himself into a "relationship" (but you have to be brash enough and well, kind of dangerous enough to survive the first attempt) and Wallace wormed his way in by being forced in Lesley's care and moping around enough that even Lesley would offer to share time together to stop it (that's complicated because you'd need a twink with enough charisma and leverage to convince Lesley not to kill you)

So hum. You'd need a loooooot of time and patience and a knack for rodents and/or early personal computers. Good luck !

If it was in between their hands they would be pretty freaked out. Egon would be quick to shift blame and say it's not his fault but he would be more outwardly shaken. Jasper would go into preservation mode and put his feelings aside to make sure they can 1) dispose of the body leaving no evidence behind 2) fuck off as quickly as possible and find the next place to rebuild. After all that I think he'll feel very, very sick, because they never intended to kill anyone with this stupid little business of theirs. I don't know if they would feel bad like a friend died because of them though, I don't think any of them (not even the masochist) see the others as such, but it would still be terrible to have caused the death of someone.
For sure if it happens they'll stop with this and go back to "normal" jobs, even if they'll probably go back to struggling with money at some point.