Fonsa was Roya of Chalion before Ias. He was known as Fonsa the Wise or, after his death, Fonsa the Fairly-Wise. He had six sons, five of whom were killed in battles contesting the mountain passes between the Roknari princedoms north of Chalion. Ias was his only surviving son.

Fonsa asked for and was granted death magic on the Golden General, an act which then resulted in the Golden General's curse against Chalion, specifically Fonsa’s heirs.