High Mage of the Malazan Empire, Nightchill is raven haired, tall and imperious. She often displays a cruel streak. Nightchill had taken Bellurdan as a life-long companion. Nightchill came down from Fenn on the Quon Tali mainland before the Unification Wars.
Nightchill attended the Siege of Pale and the assault on Moon's Spawn. During the confrontation a Kenryll'ah demon spawned and tore her limb from limb. Her remains were collected by her lover, Bellurdan.
Beyond being a mage, Nightchill is an Elder Goddess, referred to as "Sister of Cold Nights", and took part in the punishment of the High King Kallor delivered by the Elder Gods K'rul and Draconus.
After her death at Pale, her soul (among other souls) was reborn in Silverfox.