Shiratayu had a tragic and difficult role of having his clan fallen apart and oversaw the death of his son and did not lose the parental love until even to the very end.
白太夫は自らの誕生日の祝う日に、一族がバラバラとなりついには我が子の死を看取る悲劇的な役割で、なおかつ、最後まで親の温情を失わない難しい役である。