[Zuko has no idea of the kind of power this guy could exert over him--in fact, he's convinced of the exact opposite. He rears his head back, all the better to look down his nose at this newcomer.]
I am Crown Prince Zuko, heir to the throne of the Fire Nation. [Uh... ideally, anyway...] You would do well to treat me with respect.
no subject
I am Crown Prince Zuko, heir to the throne of the Fire Nation. [Uh... ideally, anyway...] You would do well to treat me with respect.
[Pointedly, he doesn't ask Jonathan's name.]