Ripped these from my PS2 copy, luckily they weren't drowned out by static like the NPC voices were.
Also for some reason the voice clips only had the highest pitch possible, I'm assuming Sega had some roundabout way of having the pitch be determined by the game client by doing this but whatever.
Anyway, I have no idea how to put these into their respective .nbl file so hopefully someone is smart enough to figure that out, this was the extent of what I could do currently.
NBL files related to this should be:
which can be found in the b787754faa6817fc3b980e751e0907f2 file.
I have no idea how to open .nbls or what type of files the voice clips are inside of them though, so hopefully .wav will do. If not, whoever wants to mess with this can convert the clips to the proper format to be inserted into the .nbls and then have them work in the PC version of PSU.
I didn't bother to separate the voice clips into different folders for each one but it shouldn't be too hard to figure out when the clips change to the female and cast variants, assuming you can stand to sift through a ton of chipmunk voices.