O might be a good fit for one of the villians, though I don't know which one.
L might work quite well for Nitori, considering that they both are water type things.
F could work for Deimos, as he loves big guns. LOVES them, and considering how big those cannons are, he'd probably just stand there in awe of the things.
Sometimes when you're driving down a road, a bug hits your windshield. It's ugly and unpleasant, but you just activate the wipers / cleaning fluid and it's gone in a few seconds. It's just part of driving down the road. You don't dwell on it, because that'd be silly. Bugs aren't worth the time.
F also increases the users strength enough to break through stone, and they can not only fire energy blasts (as fast as the standard X-Buster) but also fire balls as well (and explosives in ZX Advent.)
I might not introduce O, only the main Biometals, and Model W.
Model L would definitely match Nitori big time.
Model H might fit Otori.
Then there is Model P... who would go well with Model P?
Ya know, I was tihnking about that too. Since the Model P looks quite evil, and has those stealth-like abilities, I can imagne the Auditor getting his hands on it. Now that would be interesting.
Sometimes when you're driving down a road, a bug hits your windshield. It's ugly and unpleasant, but you just activate the wipers / cleaning fluid and it's gone in a few seconds. It's just part of driving down the road. You don't dwell on it, because that'd be silly. Bugs aren't worth the time.
I can also imagine that kind of scenario. The Auditor captures Model P, aware of the power of the Biometal's, and tries to use Model P. Model P refuses due to his good will (despite looking evil Model P is a good Biometal like F,H,L,X, and Z.) The Auditor gets fed up with Model P's attitude after enough time and corrupts Model P making it evil.
He would go straight to the corrupting from the start, though.
Sometimes when you're driving down a road, a bug hits your windshield. It's ugly and unpleasant, but you just activate the wipers / cleaning fluid and it's gone in a few seconds. It's just part of driving down the road. You don't dwell on it, because that'd be silly. Bugs aren't worth the time.
That or The Auditor could use Model P (by corrupting him) and also get Model P to try and reveal the location of Model O or Model W (maybe even both.) Model O is one of the strongest usable Biometals in Mega Man ZX.