Isaaru is a non-player character from Final Fantasy X and Final Fantasy X-2. He is a summoner in the land of Spira who travels to the temples of Yevon in search of more powerful aeons with the hopes of finally defeating Sin. Two years later, he works with Cid at a new tourist attraction.
Isaaru has brown hair, half-closed eyes and an oval face. He wears a white robe and a blue blouse with long white cuffs over it. His waist is adorned with a wide sea-green belt which has strings tied into a bow. Over this, Isaaru wears a black, knee-length jacket with sea-green edging.
Being a kindhearted and eager summoner, Isaaru is a very polite person and sees others on the same level as he is. When summoners are being kidnapped, he warns Tidus of it. He deeply believes in Yevon, and even though Maester Mika asks him to "deal with the traitor" and finding her to be Yuna, he still listens to the priest's words. He feels sorry for doing this.
Two years later, Isaaru is working with Cid at Zanarkand for a living. As Yuna intervenes into the events happening in the ruins, he begins to understand her feelings towards the place, ultimately abandoning it.