ONLY DISCLAIMER: Everything belongs to JK Rowling and Stephanie Meyer respectively.

Hey, so I've decided to start up again as, if you read my AN from my other story, my moms knee surgery went well and she's healing enough that I have time to work on fanfic again. This is a Twilight/HP crossover I'm proud of. I think it'll be very interesting. So I hope you enjoy.

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Lost and Found

Chapter One

The two vampires were hunting when Alice Cullen heard it. She looked at her sister, Rosalie, as they listened. It was crying though it sounded like a child's cries. Rosalie walked at human pace to the nearby meadow to see a shocking sight. A little girl, possibly four, with midnight black hair, pale skin, and round, green eyes, was shaking a woman who looked like her except for having auburn hair. The woman was lying on the ground and not moving and the little girl was crying as she shook the woman gently. Alice made it over and covered her mouth. Suddenly the girl looked up, tears streaming down her pale cheeks. She spoke in a quiet voice.

"Mama won't wake up." She said and rested her head on the woman's stomach. She had a slight British accent as she was only a toddler. Rosalie slowly approached and kneeled next to the little girl. The little girl looked up and Rosalie smiled sadly before looking at Alice but she was one step ahead and on the phone with Carlisle.

"What's your name?" The blonde asked.

"Evangeline Potter." She whispered. "Why won't Mama wake up?"

"Oh, Evangeline, she's in a better place." Rosalie said softly and the girl nodded before looking at Rosalie and holding her arms up. She was shocked but pleased and gently picked up the girl before standing. She didn't seem to notice the cold of Rosalie's skin. Just snuggled into her as the tears continued to fall. Carlisle and Edward arrived just before Evangeline fell asleep.

Rosalie looked at Carlisle who nodded so she blurred to the house, holding the toddler close to her. The ones in the living room looked up in surprise and Emmett, her mate and husband, followed as she went to their room. He watched as Rosalie laid the girl on the bed and sat at the edge. Before Emmett could ask, Rosalie spoke.

"Alice and I found her trying to wake her dead mother in a meadow. She fell asleep when I picked her up. Said her name was Evangeline Potter."

"What are you going to do?" Emmett asked and Rosalie sighed. "Do you know if Carlisle will let you keep her?"

"Hopefully. It was so devastating. She asked me why her mom wouldn't wake up and it almost killed me to tell her. I couldn't lie and she held out her arms, barely noticing the cold." She ran her hands through the girls hair as she slept.

"What's that on her forehead?" Emmett frowned and Rosalie looked.

"It looks like a lightning bolt shaped scar." Rosalie said. "Now where did she get that?"

Alice appeared. "Carlisle called the ambulance to take the woman." The pixie like vampire looked at Evangeline. "He was shocked to hear her last name and said he needed to talk to some people before a decision could be made."

Evangeline slept for a few hours and woke up just as Carlisle walked through the front door. The black haired girl looked around in confusion before seeing Rosalie.

"Mama is gone?" She whispered and Rosalie sighed but nodded. Evangeline said something surprising then. "Are you gonna be my Mama now?"

Rosalie didn't answer, just picked her up and held her close. She could feel her silk shirt dampen but didn't care as she held the little girl. Carlisle called for Rosalie and said to bring down Evangeline also. Emmett had gone back downstairs already. Rosalie held Evangeline as she walked down the stairs where everyone was waiting. Evangeline suddenly became shy and hid her face in Rosalie's neck. Rosalie sat on the armchair.

"Who did you have to talk to, Carlisle?" Alice asked.

"I recognized the name Potter through my friend. You all remember Albus Dumbledore?"

"Yeah." Rosalie suddenly figured it out. "Evangeline is a witch?"

"Mama called me that." Evangeline whispered and they looked at her. "She called me her little witch. She called me that when I made things float to me."

"Indeed Evangeline is a witch. A very…famous one." Carlisle said.

"Famous?" Esme asked in confusion.

"According to Albus, she defeated a very powerful wizard who tried to kill her. James, her father, was killed just before her and when her grandmother sacrificed herself trying to protect Evangeline, something happened. Apparently her mother, Lily, had moved her and Evangeline here for a new start."

"What's going to happen to her?" Rosalie asked in a whisper as she looked at the little girl playing with her blonde hair.

Carlisle smiled. "You can keep her. He feels she will be better protected here."

Evangeline looked up at Rosalie. "So you will be my Mama now?"

It was silent except for Esme making a sound, obviously trying not to start crying. Rosalie smiled at her.

"Of course."

…..

Edward sighed as he watched Eva, as they now shortened Evangeline to, draw with Rosalie and Alice. He thought about the conversation he had with Carlisle just twenty minutes before. About Eva and how just holding the four year old meant she was his mate. She was a toddler so he had no idea how that worked. It was Carlisle who had the answer. It doesn't matter the age, the second you have contact with the person, you are mates. It was kind of like how the wolves at the nearby Indian Reservation had to only meet eyes with the person and they were the wolves imprint.

Carlisle then dropped another bomb shell that he had found out from Albus Dumbledore. Somehow, the curse that was used to try and kill her would cause something strange to happen when she turned seventeen. She would become immortal like the Cullen family. They had yet to tell Rosalie, worried how she would react to the fact that her 'daughter' would stop aging at seventeen. Hell they had yet to tell her that she was Edwards mate. That was even scarier to think of her reaction. Eva suddenly looked over and grinned at him. His dead heart warmed at the sight and he smiled back.

"We need to tell Rosalie about the non-ageing at least." Carlisle had walked out of the kitchen. Edward sighed but nodded. "Rosalie, I need to talk to you about something."

Rosalie nodded and made sure Alice would watch Eva before going with Carlisle to his study. She sat with a frown. "Is this about Eva?"

"Yes." He sighed. "Apparently the curse that was used to try and kill her did affect her in a way. When she turns seventeen, which is when a witch or wizard come of age, she stops aging."

"You mean she becomes immortal?" Rosalie asked in shock.

"Yes, just like us."

"So she wont have a way to grow old with someone? Be able to have a child of her own?" She notice Carlisle become uncomfortable with those questions. "There's more."

"Edward I have to tell her. She'll be even angrier if we keep it from her." Carlisle heard a resigned sigh from the boy downstairs and he took that as an okay. "You see Rosalie, Eva is Edward's mate."

Rosalie was silent before speaking quietly. "She's his mate?"

"You know he has no say in the matter."

"She's four!"

"As I told Edward, it doesn't matter if she is. The second he held her it happened."

"But-" Suddenly Eva was heard.

"Edward, look at what I drew! It's the moon and stars!" Her voice was beyond happy and there was a chuckle.

"Very nice."

"Here, you can have it!"

Rosalie sighed. She may have a bad relationship with Edward but she knew she couldn't keep him away from her. She couldn't bear to think of life without Emmett and she couldn't do that to Edward.

"Fine." She muttered. "I don't like it though and when she hits the right age, it's up to her."

...

Did you like the first chapter? I changed some stuff such as Lily living instead of both her and James dying that fateful October night. I tried my best to explain my idea of the mating process for vampires in this chapter. I had two versions of this chapter but I stuck with this one. Alright, read and review!