I can see where youre going with this, anf it made a little more sense, in the case that youre speaking of though the classic samurai look in FF has always been the shogun, heavy armored one, so it could very likely be a tank. Though before 11 they really didnt have much in place of signature moves, tactics had them blade grasp(up to 99% evasion physical with full brave) and using katana as consumable items for aoe spell effects. Earlier there was GIL TOSS in ff5 and then Cyan from FF6 using several high powered blade attacks(but they were slow charging) as for the classic image of samurai and what it has been in previous iterations, has been a katana wielding, heavy armor using melee.