hakuoro wears an irremovable half mask that covers his forehead and extends below his eyes. eruruw, aruruw and their grandmother find him, badly injured, in the forest near their home and nurse him back to health. it is soon apparent that he has lost all of his memories, and he finds that the state of the world varies significantly from his expectations (e.g. anatomical attributes such as ears and tails are now considered normal). tuskur gives him, supposedly in place of his forgotten name, the name hakuowlo (or hakuoro) (meaning "white emperor" in ainu, also sometimes rendered in kanji as 白皇 which means the same thing) which was also the name of erurū and arurū's father, but was also his real name (erurū and arurū's father having been named after him, as tuskur had fought alongside the white god in the previous war; she had immediately recognised hakuoro as the white god).