If they do have one where there not fighting and decided to finally talk.
My idea.
Aang: So how did that happen anyway?
Zuko: A gift from my father.
Aang shocked: Your own dad did that to you why?
Zukoquitly) A few years ago when I was??still a??fire nation??prince??I decided to attend one of the Fire Nation Military meetings, my uncle warned me it not to go but I went anyway, a Fire Nation general was planing to use a new recruit devision as a suiced mission without them knowing. I protested it, because of that I had to go through with an Agai Kai.
Aang: A fire duel.
Zuko:Right only it wasnt the general I had to face it was my father, I tried appologising but he insised I attack, when I refused he attacked me with no remorce after that I was banished.
Aang: The only way you could return is if you captured me?
Zuko: Thats right, but he grew impatiant and sent my sister after me. Ive almost lost all my loved one's my mom and almost my uncle.
Aang: I know how that feels.
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