From SuspireWiki

Much like the Valkrie that their title comes from the Valkyrja are warriors of the fiercest kind making sacrifices of their enemies on the battlefield. In some domains of the Circle of the Crone a Valkrja may only be a woman but in modern nights both men and women are allowed the title.

Valkryja as also known as Berserkers, Hounds, and Labrys.