There are three known types: Avian (Borra, Bayra), Frog (Daraya, Donga), and Mouse (Pukara, Pukutak). The musicians' existence coincides with that of the woods. They may have an affinity for music as the spirits met belong to Borra's band. They have an ear for prophecy as witnessed on their talks to Yuna about the fading woods and mention of the state of the Farplane.
They can be seen in Sphere Theater later in the game.
The musicians begin to vanish along with the woods unless YRP completes the mission to save the Guado, in which case Tromell takes the musicians to Guadosalam. Tobli also employs the musicians to play in his show. Brother picks up some of the musicians who play in an impromptu concert aboard the Celsius.