Triss Merigold of Maribor is a sorceress and known as the "Fourteenth of the Hill" because she was erroneously thought to have been killed during the Battle of Sodden Hill. She is friends with Yennefer and the witcher Geralt of Rivia, but is also in love with the latter. Triss took care of Ciri at Kaer Morhen for some time and is like an older sister to her. It was through her intervention that Ciri was not inadvertently given harmful elixirs as the witchers were planning on subjecting her to the Trial of the Grasses as a last resort in an attempt to control Ciri's growing magical power. This would have either killed Ciri or made her a mutant, meaning she would become barren and unable to bear children like every other sterile witcher. Triss was a member of King Foltest's royal council along with Fercart and Keira Metz, as well as a founding member of the Lodge of Sorceresses.
She is a skilled healer and carries with her many magical potions, but she never uses them on herself because ironically, she is allergic to potions. She is also quite a powerful mage, certainly when it counts most. She wears an amulet - sapphire overlaid with silver.