Yojimbo

Yojimbo is a recurring summon in the Final Fantasy series, first appearing in Final Fantasy X.

Yojimbo is acquired by visiting the Cavern of the Stolen Fayth, where the player must hire him to become Yuna's aeon. Yojimbo acts as a sword-for-hire and has four different attacks depending on how much the player pays him, as well as a complex mathematical formula based on his worker-employer relationship with Yuna and several other factors. Yojimbo functions similarly to Odin and Gilgamesh from previous Final Fantasy games. His most powerful attack, Zanmato, instantly kills fiends and bosses.