Shifu

The Harcesis child of the Goa'uld System Lord Apophis and the Goa'uld-possessed Sha're, Shifu was created for the purpose of one day becoming Apophis' new host. He was genetically altered to rapidly accelerate in growth following birth, to make him ready for Apophis' use more quickly. Daniel Jackson delivered the child and hid him away on Abydos; Apophis was told that his enemy Heru-ur had stolen the infant. A year later, the Goa'uld in Sha're returned for the baby (believing Apophis to be dead) and sent him away to the mythical and forbidden world of Kheb, with one of her handmaidens. There young Shifu came into the care of Oma Desala, a powerful ascended being -- one of the Ancients.

When SG-1 found him there, Jackson agreed that he would be better off under Oma's protection. Thanks to Apophis' genetic tampering, he quickly grew from an infant to a young boy. But he also grew wise, with instruction from Oma, who also helped him to ascend to a higher plane of existence, where he no longer has need of a physical body.

One year later Shifu returned to Abydos on the wind. He returned to Abydos hoping to learn of his mother, and went with Jackson back to Stargate Command. There he put Jackson in a dream state to "teach" him how dangerous is the genetic knowledge of the Goa'uld he possesses, which Jackson and the S.G.C. coveted. Shifu had buried the Goa'uld knowledge deep in his mind, having learned that the only way to defeat the evil was to deny it battle.

Shifu left through the Stargate in his ascended form, and presumably resides with Oma Desala on a higher plane.