A Darkmother is a female member of the Night Priesthood of Lurra, and is always a well-learned rabbit. These rabbits are pawpicked by previous Darkmothers and trained into hardened, loyal, knowledgeable, and dedicated creatures. When a future High Priest is chosen, the new Darkmothers take the places of the previous ones and spend their days teaching their future leader the ways of the Night Priesthood, of Lurra, and of Aianar.

When the old High Priest dies and the new one is named leader, the Darkmothers each mate with him in turn in the hopes of producing litters that shall serve as fresh members of the Night Priesthood, and the cycle is continued.

There are always thirteen active Darkmothers at a time, attending to the High Priest's every need and willing to die at a moment's notice.