Summary: Being hit by the killing curse, Serena Potter is believed to be dead. What if she was transported to the Avatar world and found in the Southern Water Tribe?

Prologue

October 31, 1981

Voldemort grinned a victorious grin as he finally reached Godric's Hallow. He couldn't believe his luck when his little spy had told him that he was made the Secret Keeper for the Potters. It was like they had simply given him their location willingly. Not to mention, the adults had left, leaving Peter in charge of their twins. He frowned a bit, wondering which he should kill. He shook his head and decided he would kill the one with more magic. He saw his ever loyal pet rat standing in front of the door, waiting for him. He knew Peter only pledged his alliance with him due to his cowardliness, but he wouldn't deny that his illegal animagus form was very useful.

"M-M-My L-Lord." the rat stuttered, as he bowed, his head touching the ground. Voldemort had felt something go off and quickly set up anti-apparition wards and anti-port key wards, so he wouldn't be rushed.

"Pettigrew, where are the children?" he asked.

"U-Upstairs My Lord. In t-their room." he whispered, fear coursing his body.

Voldemort had glided his way upstairs, the glee showing on his face. He entered the room where the children were, and couldn't help but laugh. One of them was actually going to be his downfall? Stupidity! Although he wasn't one to listen to prophecies, this one was one Dumbledore had acted upon and coupled with his insanity, he decided to act fast. Upon arriving, the two children looked at him and one of the, Daniel-the red head, had began crying. He grinned at the fact he could cause fear even to the young. However, when he looked at the girl, Serena-the raven head, she seemed to be glaring at him.

"Go 'way! Ba' man!" she yelled at him in a shooing gesture as she crawled to her crying brother. The Dark Lord twitched in anger. How dare she! She was to fear him, just like-

'She doesn't fear me.' he thought and then grinned, deciding which one he should kill.

Raising his wand, he pointed it the girl, but before he could mutter his favourite curse, he heard yelling from down stairs. Feeling their magical signature, his eyes widened when he felt Dumbledore apart of the people that arrived, that consisted of the Potters and Black. When he felt they were on their way-since he knew he couldn't take on Dumbledore no matter how insane he may be-he muttered,

"Aveda Kaderva."

A green light headed towards the girl, just as the Potters had entered the room. He turned his gleeful look to them and saw the horror on their faces and then shock. Turning-much to his own shock-the girl had made her way in front of her brother and created a barrier around them both. He could feel the curse pushing back and it was too late. The curse deflected and had hit him, destroying his body. He fled, but not before promising pain.

The Potters, Black and Dumbledore had watched in shock as Serena had deflected the killing curse, which was impossible and saw it hit the Dark Lord, who they found out was in their house by the alarms. Peter's betrayal stung. When the curse hit, surprisingly, even though his body was destroyed, they saw his spirit raise from the ashes and seemingly flee. Covering themselves from the backlash, Lily and James ran to their children, but froze mid-step. On the play floor of the children, there was only one child, Daniel Potter.

"J-James...where's Serena?" Lily whispered, dropping to the floor, covering her mouth in shock as tears ran down her cheek. Daniel, having stopped crying, crawled over to his shocked mother. James just stared in shock at the last place he saw his daughter. His daughter, his princess...she couldn't be, no she couldn't!

"So sorry mate." Sirius's voice broke through, his broken voice as the man brought the distraught father and friend into an embrace, Lily's anguished cries echoing in the background.

The Potter family was never the same after that fateful Halloween night.

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Deep within the winter tundra of the South Pole was a small village of people, that lived their lives happily despite the cold climate and habitat. Thoroughly cover in ice and snow, the village could be easily missed if not spotted closely. Inside the village was the family of Chief Hakoda, his lovely wife Kya, their one year old son, Sokka and their newly born daughter, Katara. They were a happy family, well respected by everyone. Unlike a lot of rulers in their time, Hakoda was a very kind and friendly person. He was someone the other warriors looked up to as their leader and followed his instructions without a doubt in their mind.

One evening as the small family was gathered together, Kya had just brought young Katara to sleep and was getting Sokka ready, while his father played with him as she got his stuff. Coming back to where they were, there was sudden a bright light that appeared in front of the family. Hakoda immediately brought his son and wife behind him, believing that they were under attack, but when the light died down, they were not ready to see what was left.

In place of the light was a young girl, the same age as Sokka. She had raven hair and green eyes, that made Hakoda immediately think she was from the Earth Kingdom. Not seeing her a threat, he loosed his stance. The young girl, who only had a blanket with her, then began crying. Her maternal instinct kicking in, Kya ran to the girl and gently rocked her.

"Shush, its alright. Your safe now." she whispered soothing words. The young girl stopped crying and sniffed a bit before looking around.

"Mama? Dada? Danny?" she said struggling to get out of the unknown person's hold, trying to find her family.

Kya's heart went out to the poor girl who seemed lost. She looked at her husband and son, who was looking closely at the mysterious girl in his mother's arms, a girl that wasn't Katara.

"Where did she come from?" Hakoda finally asked aloud.

"It doesn't matter. I don't even think she knows, but I do know that she's lost and doesn't have anyone that would look after her." she said, smiling at the cute little girl, who had finally relaxed in her arms and was now giggling.

She might have met her moments ago, but Kya had completely fallen in love with the girl.

"We can raise her, right?" she said, looking expectantly at her husband.

Hakoda sighed, knowing he couldn't really deny his wife anything. Besides, there were hardly any children the same age as Sokka and Katara, so it would be good for them.

"We can. If her eyes are anything to go by, she's from an allied country. They're doing a lot more in the war then we are. The least we can do is take her in." he nodded and watched as his son crawled over to the mysterious girl with caution.

Kya put her down and the girl smiled brightly at Sokka, who seemed to relax and crawl over to her. Kya looked at the scene with fondness. Her eye then caught on to the blanket the young girl had. Picking it up, she saw something was written on it.

"Serena." she said, looking the blue blanket. Hakoda hovered over her shoulder, children's laughter was heard in the background as he looked at what was in her hand.

"I think its her name." he said. Kya smiled and hummed in agreement. Smiling up at him she said,

"Its a beautiful name for our new daughter."