If there are emperors brothers, where is the Dorok emperor?
Actually, that is a bit of a confusion in the translations. Those two “Emperor’s Brothers” ARE the emperors of Dorok. After the death of their father, the first Holy Emperor, they were supposed to reign the empire together, so the new titles were created for them – “Koutei” and “Koukei”. “Kou” means “Emperor”, “Tei” means “younger brother”, and “Kei” means “older brother”. So, they actually mean “Emperor, the younger” and “Emperor, the older”. Koutei has the same pronunciation as “Koutei” (emperor), but different kanji (Chinese characters). Koutei Miralupa has been the one who actually reigns the empire, since he has a mystical power, while Koukei Namulis doesn’t. When Viz started publishing the English “NausicaƤ”, “Koukei” hadn’t appeared yet in the Japanese “NausicaƤ”, so the translator just assumed that he was a younger brother of the emperor (actually, at this point in the manga, most Japanese readers thought so, too).