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It's conflicting, but I accept Katara's grudge, and animosity towards Zuko. Although I don't personally like her for her negative traits, but come to accept it's who she is and Katara has right to be hostile, and angry at the fire nation, royal family, and also the people who work for them taking her loved ones which are her mother. Her positive traits is that she's opinionated, sensitive, selfless, and responsible. Although her negative traits are moodiness, grumpy, straightforward, and brave.