Jyscal Guado

Jyscal Guado is a non-player character from Final Fantasy X. Jyscal was the leader of the Guado, as well as a Maester of Yevon, who married a human woman, furthering relationships with the Guado and Yevonites. He was apparently revered throughout Spira. His marriage resulted in a half-breed son, Seymour Guado, who was not accepted well by the Guado. Seymour and his mother were sent to the palace at Baaj, where Seymour was trained in the ways of a Summoner and took his mother's Aeon, Anima. The power of the Aeon gave Seymour terrible ideas about life and death, hope and despair and he formed a plan to destroy Spira. Returning to Guadosalam and gaining his people's trust and admiration, Seymour killed his father to become Maester. Jyscal's soul was subsequently sent to the Farplane, but most unusually, he returned for a few moments to the world of the living to give Yuna a sphere documenting Seymour's evil task. He then is sent once more by Yuna. The reasons behind Jyscal's appearance are discussed as follows:

Two years after the defeat of Sin, Pacce locates a mysterious dungeon located under Bevelle. Yuna, Rikku, and Paine traverse this labyrinth, the Via Infinito, and discover Jyscal's soul trapped there, along with several others such as that of Maester Kinoc, Yunalesca, and Lord Zaon.

It is never fully explained how Jyscal's soul became trapped in the Via Infinito. One possible explanation is that he was never sent to the Farplane following his death. One explanation is that Seymour may somehow have imprisoned him there. This would also explain how Kinoc was trapped there, as Seymour seemed to absorb some kind of power from his guards and Kinoc's corpse to become Seymour Natus. It is possible that this magic sent what remained of his victims to the Via Infinito. The dead would then, without the guidance of a sending, eventually transform into fiends. This did occur to both Kinoc and Jyscal, transforming them into bosses the player must then defeat.