(A lot of these will be from the same musical tbh, sorry)
LJ: (The whole song pretty much)
Sally:
Callie and Ada:
Ada (Voice:Delia) Callie (Voice:Lydia)
Also, one of the quotes Delia says later on in the musical sums up Ada perfectly, the quote being "I'm a part of this too. I don't get it but I'm a part of it!"
Jeff:
Toby:
BEN:
(The song above was actually made using a voice synthesizer program so it sounds kinda robotic, but that's why I like it)
Jane:
Callie: (On her own this time)
Ada: (On her own this time)
(I couldn't think of any for any of the other characters sorry)