I thought you understood but her inner character arc was from the beginning she represented naivete of a young girl she transitioned into a strong awakwened teenage girl in that 1 hear where she was not naive and trusting of people (jet, zuko), but she began to question hama and she came up with who hamas evil identity was before hama told her. She believed in aang before anyone else did because we see throughout that her trust on peoples motives dwindle throughout the series. Just because her character arc isnt as obvious as zukos doesnt mean it isnt there, u werent paying attention if u think her only trait was hating the FN which isnt even true