Yuna and Lulu definitely have the nicest voices. Yuna's being soft, but determined, and courageous, yet compassionate. Lulu's, is velvety and smooth, and gives an impression of beauty, intelligence, maturity and strength as Big D said.

Rikku's is just friggin annoying. She sounds like a 10 year old. Someone give her some Ritalin, for god sakes .