Maeda Ai (Tachikawa Mimi from Digimon Adventure) is Sailor Pluto.
Fukuen Misato (Elicia from FMA: Brotherhood, Hajime from Pretear) is Chibi Usa/Sailor Chibi Moon.
Trailer for the Black Moon arc:
https://www.youtube.com/watch?v=7q-rU8s9HCY
So what are we thinking? I think Maeda Ai sounds PERFECT as Pluto, but I was initially a bit underwhelmed at her character design. I still love it, though!