Djinn Baal
Mystras Leoxses is the older son of Darius Leoxses. He is a candidate for the next Knight-King of Sasan.
SpoilerHe activated his Household Vessel of the Djinn Baal during a fight with Hinahoho, and became one of Sinbad's Household Members until his death during the battle of First Kingdom of Sindria. He was replaced by his younger brother Spartos as one of Sinbad's Eight Generals following his death.