Azula: In my country, we exchange a pleasant hello before asking questions. Have you become uncivilized so soon, Zuzu?
Zuko: Don't call me that!

Azula: It's terrible when you can't trust the people who are closest to you.

Azula: Sorry I'm late, Father. Good palanquin bearers are so hard to come by these days. So, is everything ready for our departure?
Ozai: There has been a change of plans, Azula.
Azula: What?!
Ozai: I've decided to lead the fleet of airships to Ba Sing Se alone. You will remain here in the Fire Nation.
Azula: But I thought we were going to do this together!
Ozai: My decision is final.
Azula: You... you can't treat me like this. You can't treat me like Zuko!
Ozai: Azula, silence yourself!
Azula: But it was my idea to burn everything to the ground! I deserve to be by your side!
Ozai: Azula! Listen to me... I need you here to watch over the homeland, it's a very important job that I can only entrust to you.
Azula: Really?
Ozai: And for your loyalty, I've decided to declare you the new Fire Lord.
Azula: "Fire Lord Azula‌"... it does seem appropriate. But, what about you‌?
Ozai: Fire Lord Ozai is no more. Just as the world will be reborn in fire, I shall be reborn as the supreme ruler of the world. From this moment on, I will be known as... the “Phoenix King”!
The Old Masters

Azula: That's a sharp outfit, Chan. Careful, you could puncture the hull of an empire-class Fire Nation battle ship, leaving thousands to drown at sea. [Points] Because... it's so sharp.
Chan: Ummm... Thaaanks.

Azula: The Avatar? My lucky day!

Azula: We have been presented with an extraordinary opportunity, girls.
Ty Lee: Mai finally gets to wear make-up that's not totally depressing?

Azula: You still don't know who I am? You don't see the family resemblance? Let me give you a hint. (covers left eye with her hand, imitating Zuko) I must find the Avatar to restore my honor!
Aang: (stares with blank face)
Azula: It's okay. You can laugh. It's funny.

Azula: [After winning a game of beach volleyball/"Kuai Ball"] Yes! We defeated you for all time! You will never rise from the ashes of your shame and humiliation! [pause] Well, that was fun.

Bumi About the right time to strike: "I didn't know what or when, but I knew I'd know it when I knew it!"

Bumi: So what about you guys? Did you do anything interesting on the day of the eclipse?
(Sokka and Zuko look at each other)
Zuko: Nah.
Sokka: No, not really.

Bumi: Wait! Someone's missing from your group! Someone very important! (King Bumi leans into Sokka's face, wide eyed, they are nose to nose) (pause) Where's Momo?
Sokka: He's gone... and so is Aang.
Bumi: Oh, well. So long as they have each other, I'm sure we have nothing to worry about. Let's go. (he Earthbends himself in the air and laughs crazily)

Bumi: Well, look who's here. (Katara and Sokka smile)

Chong: (singing) Two lovers, forbidden from one another, war divides their people, and the mountains divide them apart. Built a path to be together - (talking) Yeah, forget the next couple of lines but then it goes - (singing again, rocker style) SECRET TUNNEL! SECRET TUNNEL! Through the mountain! SECRET, SECRET, SECRET, SECRET TUNNEL! Yeah!
[everyone claps]

Chong: Hey, I remember that line of the song! (Gets his banjo and stands in the front of the cave and sings) AND DIE!!

Chong: We don't need a map. ...We just need love.