The Witcher 3: Wild Hunt Artbook

MONSTERS
The Crones
The Crones of Velen do not come to us from the witcher novels, yet they
bring a look and feel that fits in perfectly with the established character of
a world full of monsters and other elements drawn from European folklore.
These three sisters are not human; instead, they are members of some
degenerate breed of humanoid monsters whose origins are hazy, even to
scholars and witchers. Each of the three has her own function and unique
abilities for performing it. The oldest of the sisters, Whispess, can hear
everything that happens in the swamps of Velen thanks to the sliced-off
human ears she hangs from the trees and imbues with magic. Brewess
brews magic concoctions and mixtures, while the youngest of the three
Crones, Weavess, weaves magic fetishes from human hair.