Bran Mak Morn's mindset was very unusual for his time and location, because he favored an alliance of the "native" British populations, including the Picts, Bretons, and Celts, against the Romans, in a setting when each of these tribes fostered an intense hatred and mistrust for all the others. Robert E. Howard also mentions that some warriors among the Picts could assume the forms of wolves, in the manner of werewolves, on their own free will. These Picts were a "race" with whom Howard felt the most affinity, and for this reason they were one of his favourite subjects, despite being almost wholly fictitious and deviating from historical fact.