You and Katara we're not on good terms, to say the least. You've frequently tried to hunt down Aang and always tried to hurt or even kill them whenever you stumbled upon them.

"I can't believe I have to suffer down here, with you." She had an undeniable look of resentment burning within her eyes.

So when both you and her got imprisoned together in the Crystal Cave in Ba Sing Se, she was absolutely burning with rage.

"Oh right, I forgot you're the 'Prince of the Fire Nation', of course there's destruction everywhere you go." She scoffed.