Gonna go with Carbuncle, Yojimbo, Odin and Syldra. I have a major weak spot for badasses with swords or katanas so Yojimbo and Odin were a given. Syldra actually had a pretty solid storyline attached to her so yay for her. Carbuncle vs Adrammelech wasn't as trivial, but ultimately Adra wasn't all that memorable compared to Carbuncle who's useful time and time again in many a Final Fantasy game.