Azula was present during Zuko's Agni Kai duel with Ozai, laughing in her brother's face soon after he was burned. She gladly accepted her father's task to "stop the Avatar from mastering earth and fire," and to give the Fire Nation time for Sozin's Comet to arrive.
Azula appears to have the same personality she carries through much of the animated show. For example, she is shown laughing when Zuko is burned by Ozai at their Agni Kai, and she more than gladly accepts the challenge to capture Aang at the end of the movie. Along with appearing in two scenes during the movie, Azula also appears in a pocket sized portrait of the royal family, in which their mother is also present.
Azula's appearance in the movie is semi-different from her animated counterpart. She does look more her age, despite her actor being seven years older than Azula. She also does not have her signature hair style of the top-knot. Instead she is shown with it down and straight.