Last Time

Katara glared coldly. "You won't hurt my sister."

Sokka and Aang had equally confused looks on their faces, "What are you talking about she's not our sister," Sokka said, loosening his grip just a little on his meteorite sword.

"Your not my brother...she is my sister!" Katara snapped angrily.

Sokka didn't know what was going on. He intended to liberate Katara and take out Azula in one fell swoop but this...this was far from the plan, "Katara listen, I don't know what Azula said or did to you but Sokka is your brother and we are your friends," Aang said with a calm voice, hoping to reason with Katara.

"Liar! You used me!" Katara screamed.

Aang's eyes widened, "W-What are you talking about Katara?..." The young Avatar asked, deeply hurt.

"You led me on!" Katara roared, enraged.

"K-Katara...You can't believe that..." Aang murmured softly.

"I do! Now you're gonna pay!" Katara snapped, her cold blue eyes flashing murderously.

Aang reluctantly entered a fighting stance while Sokka shook his head, "I refuse to fight my own sister..." He pointed his sword at Azula, "But I will fight the bitch responsible for brainwashing her." The young warrior said coldly at Azula.

"Oh no, I'm so scared." Azula taunted sarcastically.

"You should be," Sokka pointed his sword at Azula. While Sokka was a sarcastic, witty, young man when his friends or family were at stake he could be a powerful, confident warrior. He stared at Azula, radiating confidence.

Azula faked a yawn before giving him a fire blast.

Sokka swiftly sidestepped the fire blast, sending a statement to Azula.

Katara however surprised him with an ice blast that was designed to quickly freeze it's target.

Sokka barely had time to set his feet as he was frozen in place. Aang was aghast at the sight of Sokka...Katara's brother...encased in ice.

End Flashback

Katara smirked smugly. It was clear she had no regrets or remorse for freezing Sokka.

"Katara..." Aang said in shock, "H-How could you?" He asked in stunned shock. He couldn't believe that the once sweet Waterbender could do such a thing and have absolutely no remorse about it.

"He deserved it!" Katara snapped. In her new mindset, Sokka was the enemy and she had no qualms about hurting him.

"You really think I just used you...all this time?" Aang asked, his heart felt like it was going to shatter. This was without a doubt his lowest point in life so far.

"I know so! Azula told me!" Katara snapped. She had complete trust in her sister.

Aang glared at Azula, rage in his eyes, "If you're the cause of this...then I will make you fix this." He growled dangerously. Aang had hardly ever felt this angry. He couldn't will himself to hurt Katara but Azula was an entirely different story.

"Am I supposed to be scared?" Azula deadpanned. She clearly didn't see the young Avatar as a threat.

Aang was sick and tired of Azula's arrogance. He growled softly and focused, using a waterbending move that Katara taught him he created a large water whip and lashed it at Azula, hoping to grab her arm.

Azula growled as the whip grabbed her arm, but Katara quickly gave her former friend a waterbending blast to the stomach. She refused to allow anyone to harm her sister.

Aang was pushed off hard, sent flying back a little but his masterful airbending skill helped him stay stable. He re-entered his fighting stance and formed an airbending wave to try and blast Azula with.

Katara however jumped in the line of fire to protect her.

This resulted in Katara getting blasted across the room and sliding across the metal floor on impact, "Katara I wasn't aiming for you!" Aang yelled. He was trying to hurt Azula, defeat Azula, not harm Katara.

"She's sworn to protect me." Azula sneered.

"No! You make her THINK she's sworn to protect you!" Aang yelled, "You have done some evil things since I've known you Azula but this...This is unbelieveable." Aang murmured, digusted at her.

"Then try and attack her, she is on my side after all." Azula dared the young airbender.

"No, I won't," Aang said, looking at Katara. No matter what he could never will himself to hurt someone who has helped him so much even now in Katara's new mindset he still saw Katara as more than a simple ally but a friend.

Katara however didn't see things that way as she fired a water whip at him.

"AAAAAAGH!" Aang cried in pain as the impact of the water whip connected with his back and sent painful tingles down his spine.

Katara chuckled coldly. It was clear in her new mindset, she was a ruthless warrior who would take pleasure in her enemies' pain now.

Aang didn't know what to do. He did not want to hurt Katara after everything they've been through together but he was going to have to if he wanted a clean shot at Azula. That was when an idea formed in his head, he just needed to do damage to both girls to do it however.

"Well Avatar?" Katara sneered. She was expecting him to surrender due to the intense psychological and emotional pain she was dealing him.

Aang took a deep breath, "Sorry I have to do this Katara." He whispered before running hard in the direction of both ladies, stopping quickly, and perfomring a quick spin, making a whirlwind.

As Katara and Azula were blown back Aang went to Sokka and drew fire to his hands before touching his icy coffin, using firebending to melt the ice that contained the Water Tribe warrior.

"Thanks Aang." Sokka smiled sheepishly.

"Lets go to the main deck," Aang said, grabbing Sokka by the arm.

"Good call Aang." Sokka agreed. He knew their best bet was to face them on the upper deck with less margin for error.

Aang with Sokka in tow sped to the stairs, on a swift path to the upper deck.

Katara rose to her feet, growling angrily. She was more angry at Aang than herself, but still Azula knew an angry fighter was a sloppy one and knew she had to calm her down.

"Relax sister, take that anger out on the Avatar." Azula said, rising to her feet.

"I'm..not used to this." Katara admitted. She usually never channeled her anger this aggressively so this was all-new for her.

"Don't worry, I'll help you get used to channeling that anger." Azula tried to reassure her sister. She was the veteran and the master tactician, so she knew exactly what to say in these situations.

"How, sister?" Katara asked demurely. She was eager to learn from her big sister.

"By finding an outlet for that agression." Azula said, peacefully.

"Show me." Katara cooed silkily.

"One way to do that sister." Azula smirked.

"What is it?" Katara asked with a smirk of her own.

"Kill the Avatar, bring him back to our father for proof." Azula answered evenly.

"You think I can?" Katara asked softly, touched by her sister's belief in her.

"I know you can," Azula said calmly. She had complete faith in her sister that she could prove her undying loyalty to the Fire Nation by slaying the Avatar.

"You're sure?" Katara asked innocently.

"Yes, I'm sure Katara. You will be hailed as a war hero and beloved for all-time. Generations from now, people will speak of your courageous and brave exploits of killing the Avatar and bringing true peace to the world sister." Azula cooed, smiling sweetly.

"Let's do it then." Katara grinned, eager to make her big sister proud.

Azula nodded, running out of the lower deck with Katara by her side.

Meanwhile, Sokka and Aang made it to the upper deck with the rest of the team. Zuko, Toph, Suki, all stood with Aang and Sokka as they waited on Azula and Katara.

"This is nuts.." Toph mused.

"This shouldn't be happening, Katara is supposed to be fighting with us, not against us." Suki said.

"My sister brainwashed her.." Zuko murmured grimly. He knew that was the only explanation.

"What?" Suki asked in surprise. She knew firsthand that Azula was a good embodiment of the word 'evil' but she never thought she'd use brainwashing on anybody.

"It's the only explanation, right Aang?" The former Crown Prince asked.

"He's right," Aang said, speaking those words were not easy by any means. None of this should be happening right now, Katara was supposed to be with them, on Appa, heading back to the island by now.

"We'll help her Twinkle-Toes." Toph assured. The blind Earthbending prodigy knew just how much Katara meant to her friend.

"Thanks guys." Aang nodded, glad that he had some friends by his side before his ears perked up in alarm, "Here they come!" Aang said, hearing footsteps approach as Katara and Azula came charging on to the upper deck.

Katara glared at them murderously. She didn't want a 5 on 2 battle, she wanted the Avatar alone in a 2 on 1 fight so she and Azula could kill him together as sisters.

"Katara...we don't want to fight you," Aang said, still showing relent and care for her, "We're your friends." He gently insisted, trying to jog her memories.

Katara groaned, her hand pressing against her forehead in pain and distress. "L...Leave me...alone!" She roared angrily.

"Please Katara...you did so much to help me, Zuko, all of us," Aang's grey eyes twinkling in the sunlight as he spoke gently to her, "We would never use you."

Katara was groaning in distress. Aang's words were burning in her brain, threatening to drive her out of her mental fog and she hated the thought of that.

"Sis, snap out of it," Azula said, "You're stronger than them, stronger than this." She soothed, rubbing her sister's back lovingly.

"Az...Azu...Azula..." Katara moaned. She needed her sister's love and guidance more than ever now.

"Please, Katara...I know you would never listen to Azula. Without you I wouldn't be here right now," Aang said.

"Shut up Air Nomad, your people were the cause of this war. How dare you talk to Fire Nation princesses like that!" Azula snapped angrily. How dare he accuse her sister of being disloyal to her people!

The two voices of the two people closest to Katara's heart were trying to tell her which path she should follow, good or evil.

Katara was very conflicted as she backed away, clearly unsure which side she was on.

Even as a pack of Fire Nation soldiers came up to join them Azula was unsure that she could fight the heroes even with the odds now evened up given Katara's mental state.

Katara gave Azula a look, clearly unsure.

"Katara, we need to go," Azula said, reluctance and worry brewing inside of her. She hated feeling so unsure, it drove her nuts.

"Your right sis, we have to retreat." Katara agreed.

"Hold them off men, come on little sister, I'll keep you safe." Azula said, taking Katara's hand and going towards the water to escape and hide and use the sea for travel.

Katara nodded, holding tightly on to her sister. She knew how much Azula loved her and would do anything to keep her safe.

"Do your thing sister." Azula smiled, holding her close as they jumped off of the ship and into the water.

"You got it sis." Katara smiled back, using her waterbending to transport them along the water.

Azula smiled, knowing that they were safe now...or so she thought. What she didn't realize was that Aang was in hot pursuit of them..

Aang was already behind them, using waterbending to propel him through the water like a living jetski.

"The Avatar's behind us!" Azula called. She knew they had to evade Aang quickly or they'd lose their chance at an escape.

"Blast him sis!" Katara smirked evilly. She knew one blast of her sister's Firebending would do the job perfectly.

"Slow down just a little bit," Azula smirked, wanting Aang to get closer before she attacked.

Aang was slicing through the water, Azula and Katara were in sight. All he needed was to launch one good strike...

Katara happily slowed down and Azula launched a quick, precision-aimed fire blast right at Aang.

Aang went to try and dive at Azula and Katara, only to get a face full of fire. "AHHHHH!" Aang screamed in pain as he was sent rolling in midair and into the water.

"Hmph." Katara scoffed before speeding off with Azula. It was clear she didn't have a care in the world for the Air Nomad's safety.

Their getaway and intial fight with the Avatar and his followers was an immediate success...

To be continued...