I have a basic idea of how they sound, for sure, but don't we all wish technology was convincing enough to just make their voices haha.
At the very least I know how they speak. Krisle for example drops a lot of letters in his words and blends some together, so his dialogue is usually written like " Yes, Y'did, and I'mma hafta kill ya for it!" - He also says, Uh, and Um, a lot? I imagine his voice fairly high actually, but with a boisterousness.
Trisc on the other hand, while shorter (by a lot lol) I imagine with a lower tone (Like middle ranged???), that is easily inflected by emotion. (IE, goes up in tone when clearly flustered/angry). It also tends to shake when he tries to get louder.