<Dd> Zuko's paternal uncle and the brother of Fire Lord Ozai . He is very easy - going and friendly, and often acts as a surrogate father to Zuko . Formerly a great general of the Fire Nation, personal tragedies led to his retirement, and the role of heir - presumptive passed to his younger brother . He is the only firebender shown in the film who is advanced enough to bend fire using only his chi . </Dd> <Ul> <Li> Aasif Mandvi as Commander Zhao </Li> </Ul> <Li> Aasif Mandvi as Commander Zhao </Li> <Dl> <Dd> A hot - tempered Fire Nation Commander in pursuit of the Avatar . He is Zuko's principal rival . He has an obsession with libraries . </Dd> </Dl>

Who plays june in avatar the last airbender