Olivia officially became Vilgefortz's only apprentice. The in-game Database was updated with that information. The complicated history of this formidable "prestige master" was revealed in "character information" tab.
One of the Vilgefortz's parents was a sorcerer. They had abandoned young Vilgefortz, who was later found by Druids of Kovirian Circle in the poor suburbs.[1][2] He was brought up and taught by the druids, living his life as a nomad alongside with them.
In an unexpected incident, Vilgefortz talent was discovered by other sorcerers. They invited him to join the brotherhood, which he had rudely rejected. Moments after turning them down, he had left the Druids community and wandered across the land. He became a soldier and a spy.
In the last chapter of his journey as a wanderer, he fell in love with another sorceress, who he left not long after.