I hope i don't bother you, but i think i have to change Saya's class. After thinking about it, she seems more of a hybrid class, with black belt as her secondary. Black belt or monk since she uses close range attacks and her fists, but since she is an Al-Bhed she is also skilled with mechanics and even uses a mechanic weapon. I can even adjust her limit attacks to that by simply creating bullets for her gauntlets from items instead of striking with raw power. And she also doesn't look like a miss universe it i may say that.
It may be just me, but she is more of a Mechanist/Gadgeteer/Tinker or Engineer than a black belt.