Daughter of the Eleventh and a sidhe assassin, Oliosi is a unique Immortal with the power to kill and the talent to command powerful magic. She is the embodiment of offensive, combative magic. She serves as the personal assassin for the Mother of Greater Magic, usually targeting dangerous Void-followers. She became a friend and then lover to the Lost Archer after meeting him at a Moot of Gatherers. She is a former lover of the Dirginesinger, Locke Gray.