The only weapon that really personifies each and every final fantasy is... ANTI GRAVITY HAIR!!!

FF - Fighters hair.
FFII - Frionels hair, Leonhearts hair in the battle screen.
FFIII- Fighters Hair yet again.
FFIV - Cecils hair in the battle screen
FFV - Bartz/Butz's hair
FFVI - Gau's hair
FFVII - NEED YOU ASK?
FFVIII - Zells hair
FFIX - Zidanes Hair to some extent.
FFX - Tidus's hair to some extent.

And some of those cuts, like the cut of you know who *CoughcloudCough* were TRULY dangerous weapons.