The Birnir are a group of fighters from throughout the Hearthlands who have rallied to the new hamlet of Auberon. The culture of the Birnir is influenced by not only their first Chieftan, Kieran Martyn, but additionally the Bjarndýr. The Bjarndýr were an ancient tribe that used to wander the fire mountains long ago but died out during the Golthan occupation of the area. Relics of the tribe excavated from the land are honored in the hamlet of Auberon alongside Odar. Many of the Birnir adorn themselves with furs and red war paint as a way to honor the gods. The Birnir have served as a shieldwall unit of the Hearthguard under Fänrik Kieran "The Great Bear" Martyn but for the meantime they have been sent back to the hamlet of Auberon to train additional troops for the battles to come. 

Members of Birnir follow in their leader’s footsteps and adorn themselves with images and pelts of bears. Birnir fist are the only members of the Hearthguard who wear bear pelts.