Sabrina Glevissig/Netflix series

Sabrina Glevissig is a sorceress, as well as a member of the Brotherhood of Sorcerers.

Ascension at Aretuza
Sabrina is one of the initiates brought into Aretuza by a sorceress named Tissaia de Vries. Sabrina joins the other girls in the greenhouse, who much like herself can tap into magic. Tiassai explains the dangers of magic and how each one of them showed an aptitude for controlling it, making them conduits of chaos, though magic itself is the control of chaos. She has gathered them for a trial. Before each of them sits a flower and a stone. They are to lift the stone without touching it. Fringilla is the first initiate to lift the stone, however, as demonstrated, magic comes at a price. Only seconds after Fringilla lifts the stone does her hand rapidly age and shrivel up. There is a give and take with magic, as Tiassai demonstrates by lifting the stone, but with the flowers in hand to represent what is taken as they grow old and die. Sabrina follows her lead, as do the other initiates, with the exception of Yennefer, who is unable to move the stone.

Several weeks have passed. The initiates are taken to Tor Lara to bottle lightning. It is the most potent place on the continent, off limits to everyone except to the Brotherhood of Sorcerers. This latest trial is to test their ability to control the ultimate expression of chaos. Sabrina raises her bottle effortlessly captures the lightning. In her jealousy, Yennefer shoots lightning at Tissaia, who redirects it back into the sky.

Initiation
Sabrina, along with her fellow initiates are officially initiated into the Brotherhood of Sorcerers. She stands before the Chapter and offers herself to them. She later attends the Aretuzan ball.