Summary: When Althea Potter finds an old Peverall ritual, she jumps to another dimension to find happiness. Perhaps this quiet town of Mystic Falls will be the place?

Crossover

TVD x HP

A Vampire Diaries and Harry Potter fanfic. Hope enjoy!

Althea Lillian Potter was the young niece of Petunia Dursley nee Evans. Her parents having been both killed in a car crash, she was sent to live with her aunt and her family. There she was neglected and abused due to hatred and jealousy, none the wiser due to the lies the Dursleys spread about her.

Althea, or simply Thea as she liked to go by, was a very smart child. She had realized at a young child that no one would help her and the only person she could rely on was herself. She did all her chores and everything that was asked of her, and when she was sent out she went straight to the library.

The library had become some sort of sanctuary for her when hiding from Dudley's gang. Dudley was an idiot and would never be caught inside the library. Of course, she never just sat there. Althea read book after book on many different yet useful books she could use. She was well ahead of many of her fellow classmates she was sure.

She wasn't allowed to do well in class, but after reading that the only way she could get a good job and leave the Dursleys for good was to get good marks, she began excelling. Sure she was beaten, but she'd getting beaten either way so it didn't matter. She'd get a her revenge on these people one day, she just knew it.

However, for the life of her, Althea never knew why they hated her. They would call her a freak but she didn't know why. It was when she was seven and running away from her cousin and teleport to the school roof did things change.

She teleported! Teleporting wasn't something normal and after she was locked into her cupboard under the stairs, she tried to access that power again. She tried and tried and after experimenting for a week, she had managed to levitate an object, though for a bit. She felt tired and drained, but grinned. This was her salvation.

Any time she was alone, she practiced her powers. Soon enough, she couldn't only levitate, but fix broken objects, shrink her clothes, change the way she looked and even create fire all in a span of a couple month-almost a year. It took a while, but it was worth.

One thing she was proud of however, was the fact that she could look into a person's memories. Her range was a person to person, to an entire area. She had to mediate a lot, which also helped her powers but had began the Jedi mind tricks she had heard about. It was a lot of fun trying it on the bullies.

So when the Dursley family returned from their weekend trip, many changes occurred. She had gotten a bedroom, she made her own food and not theirs-she didn't trust them enough to not poison her-and even got money to buy her clothes.

Accessing their memories had given her a better understanding of why they hated her. Vernon, because he was normally prejudice and bigoted, Petunia because she was jealous of her sister on everything, and Dudley just followed his parent's example.

From Petunia though, she learned the most. There was an entire wizarding world hidden from the non-magical one. The prude woman had gone once when her mother-she finally got to see how her parents looked liked!-had gotten an acceptance letter from a magical school called Hogwarts when she turned eleven.

Althea wanted to go and see this wizarding world. From Petunia's memories, she learned that her father came from an old family line with lots of money-another thing the woman was jealous of-and so she had probably inherited it all. She didn't like this Albus Dumbledore who had left her on the street with a letter saying she would be famous for some reason.

When summer break had began she had gotten some money and made her way to the Leaky Cauldron after changing her appearance. Knowing the way to the bank was simple from Petunia's memories but that didn't mean she didn't look around first. It was absolutely amazing and she could wait to learn everything.

She was correct in assuming that she had inherited a lot of money from her father. A lot meaning billions! The goblins-bankers-were surprised and furious she never received a monthly balance and had done an audit on her accounts.

Apparently this Dumbledore had tried to take money from her, but was unsuccessful but he did manage to become her Magical Guardian, although illegally. The man and another woman named Molly Weasley, who also tried to take money fro her accounts, had set up a marriage contract with the woman's son but it was illegal thankfully.

As much as she would have loved to breath down their necks and have them arrested, Althea had decided to wait until her Hogwarts letter in three years. Then she would strike. The goblins were equally vicious and said that she could get emancipated when she turned eleven due to the End of The Line Clause.

She was then checked over by a goblin healer, where the many bindings on her magic and abilities were discovered and removed as well as a disgusting soul leach from her parent's murderer, in which the goblins explained everything to her. Her account manager was great that way and she made sure to give him a raise.

They had given her a Gringotts card that worked in both worlds as well as some potions to correct her malnourishment. Then she contacted the Potter house-elves, who were happy to have finally met her. They took her to Potter Castle, which was an actual castle on an island on its own. The island was huge and was the home of many magical creatures either common, rare or thought to be extinct, like Griffins.

The Castle was amazing and she met many portraits that belonged to her ancestors, who were horrified and angry on her behalf. Although she didn't want to, she had to leave and go back to Privet Drive, but promised to be back the next day. The house elves went with her and had transformed her room completely, even expanding it.

Althea was extremely busy for the next two months. She bought clothes from both worlds and taught etiquette from her ancestors. They had taken over teaching her things on both theory magic and practicals. Without the blocks, her magic was much more easier to use. They were proud and outstanded that she was a shape-shifter as well as a parsalmouth.

The elves dealt with her food and potion intake and she would play around with the magical creatures on the island, who were friendly with her due to her family protecting them. She also went through the vaults of the Gryfindor, Ravenclaw, Slytherin and Peverall that she had inherited. She loved the parsalmagic magic books in the Slytherin vaults and those on mind magic from the Ravenclaw vaults.

The Dursleys never asked her where she went and she never told them. They tried to go into her room once, but the Potter elves warded it against them so it was futile. Soon enough school started so she had to cut down the amount of lessons she had gotten from her family portraits.

Althea also began trying to find a way to have electronics work around magic. She studied runes and artithmacy, but it was a slow process. Once she realized that she had about hundred of elves, she had given them tasks. Each one would learn a skill, like driving, creating magical objects, even making the floo. She realized that elves were pretty useful and could do anything, but needed to be told. A lot of them went into the muggle world to learn about to do things.

She had also learned about the Potter allies and how she had a godbrother in one Neville Longbottom. Contacting him via Owl, she explained her story to him and he told her about himself. She decided to work on his confidence and magic as well. His grandmother was introduced and the woman had said she would help her take Dumbledore down.

Three years went by as the elves learned and she learned from her ancestors. During the summers she had taken to going to specific magical areas to help her with her magic. The goblins were really helpful that way. She also learned different languages and different musical instruments, though she enjoyed the piano.

Another thing she learned while she was in China was martial arts, or combat magic. It was when a person channeled their magic through their body, their muscles and was taught hand to hand combat. Althea didn't want to be defenseless when she didn't have a wand or didn't have access to her magic. Her ancestors agreed. She learned how to wield a sword in Japan in another summer.

Due to her recalling Gryfindor objects and other vault objects, she was in possession of the Sword of Gryfindor. When she learned it was goblin property and wanted to return it-and earning many brownie points with the goblins-she couldn't. They were alright with it and she learned it could change shape, so she made into a bracelet. She had elves learn how to make weapons as well.

Some of the objects however weren't as great as they were containment with soul shards like her scar. She had them removed and learned that there was another one inside the vaults of a known Death Eater. Since it was in violation of their code, the goblins gifted her with the cup, but took the gold for themselves. She didn't really need the gold anyways.

When her Hogwarts letter had finally arrived, her plan was set into motion. Her guide was a half-giant and although a gentle soul, it was obvious that he was sent to make her hate Slytherins and go into Gryfindor, which was stupid, because her grandmother Dorea Potter was a Slytherin and she was awesome!

Having gotten herself emancipated, that's when things really began moving. With the goblins' help, she had managed to charge both Dumbledore and Molly Weasley with attempted line theft. People were surprised in seeing her when she went to the court room, especially Dumbledore. She believed he though she would look malnutrition and weak, not the beautiful strong willed girl she was.

Sadly though, Dumbledore still had a lot of supporters and had managed to get both himself and Molly off, but his reputation was destroyed and he lost two positions, now only being Headmaster of Hogwarts. Molly Weasley had to pay a heavy fine, straining their already poor family more. Althea simply announced she should be glad she never declared a Blood Feud since her husband had sworn he never knew. This got her looks of respect.

After that, it was some how revealed how a Sirius Black, her godfather was illegally placed into Azkaban, and after coaxing the Minister by saying he was correcting the previous administration's mistake, the man had gotten a trial which declared him innocent. Althea was a bit conflicted on the matter of Sirius Black, so she decided to see how he was.

Besides Neville Longbottom, she had met Susan Bones, Hannah Abbot and Luna Lovegood-her godsister. Luna didn't start Hogwarts until next year, but warned her about Ginerva Weasley, who was obsessed with her.

It was right before she began school did she venture into the Peverall library and found out a shocking secret. How, she didn't know, but the Peveralls, who later married into the Potter family had somehow jumped dimensions, having lived into another before coming to this one. The world they were originally in were one of vampires, werewolves and witches but they were different than the ones here.

Over there the vampires don't have their magic anymore once they turn. They looked like regular human, contrasts to the ones here who were very pale had red eyes and sharp teeth, but they burned in the sun. To prevent it, they had to wear a charmed ring.

For werewolves, a person had to be born with the gene and if they were to kill someone, they triggered the curse. It was painful and the had no control of themselves when they were wolves. Their bit was only fatal to vampires.

The witches there didn't have cores, but channeled the magic of the earth to use its power. There psychics and siphoners-witches that didn't have any magic, but could siphon the magic of another magic being or the earth to use magic. They were normally looked down upon and treated horribly.

Althea had gotten into Gryfindor to honor her parents. The Weasley family was in the same house and instead of hating her, they had apologized on their mother's behalf, which she waved off. They didn't do anything so had no reason to be held accountable for her actions. Ronald Weasley on the other hand was an annoying pounce, saying that she was arrogant and believed to be better than him, which she turned around and said she was better than him and to shut up.

He wasn't the only one. Another girl named Hermione Granger had glared at her in every class when she did all the practicals first and praised. The girl was a nightmare and always raised her hand to answer the teacher's question, much to everyone's ire. She was a nuisance in the dorm as well as they shared the same room with another two girls, Lavender Brown and Pravati Patil who offered to give them make overs as a bounding thing. Althea excepted as they were both really good, but Granger kept harping how they shouldn't waste time and study.

No one liked her.

And then the girl decided, along with Ronald, that they were best friends, which not only baffled her, but everyone there. A quick look into their mind showed that they were told by Dumbledore to spy on her and befriend her in exchange for money and books. It was really sad and pathetic, so she stayed far away from them.

Professor Severus Snape also tried to bully her, but she shut him up by saying that if he kept it up she could have him on trial as Lady Potter for his part on telling Voldemort about the prophecy. Yes, she knew about the prophecy from her mother's journal, which she found stupid. That had shut him up, but he still glared at her, not that she cared.

By asking the house elves, she had found a room they dubbed the Come and Go room, its actual name being the Room of Requirements. It was where all the things lost were placed by the elves and she found so many useful things. She had her elves to go through them and copy down the entire Hogwarts library.

The room was very useful, but what she loved the most about it was the Time Chamber. She could compress a month into a day maximum, but it was still worth it, considering she never aged. It helped speed things up a lot, especially since she decided to leave this world and go to the one of the Peveralls were from originally.

Her first year was quite productive and she even managed to get the Philosopher stone without anyone knowing and get the famed Alchemist to get her lessons. Dumbledore had brought her to his office and told her that it was important for her to go to her relatives' home, which she flipped him the bird and left.

Before coming to Hogwarts, she had, with the goblin's help, had the Dursleys arrested and their good name was smeared as well as the reputation of the neighborhood for believing such blant lies. Last she heard, they were having it pretty rough, but that didn't stop her from sneaking in and torturing them herself. Revenge was sweet!

She had gotten healing lessons from Poppy, the school medi-witch. Healing was very useful and seeing as the woman was free most of the time, she was happy to have as student that had potential. Althea actually wanted to find a way to create medicine potions to help muggles with their illnesses.

Gryfindor won the House cup, but not the Quditch cup. Professor McGonaggal tried to get her on the team, but she simply gave the older woman a cold glare and told her that she wouldn't listen to a woman who was perfectly fine with leaving a toddler out side in the middle of the cold November night on the words of a man. The woman looked like she was slapped but never mentioned it again. Occulumency was amazing in remembering things.

Then she met Sirius Black and she surprisingly found herself relaxing. They hit it off pretty well. She told him that she was going to the Flamels to learn about Alchemy, so if he wanted to leave the country to go have fun it was alright with her. He agreed and gave her a two way mirror that he and her dad used for communication purposes and said if she needed anything he was a call away.

It had really touched her and when she found out that he wasn't talking to his old friends due to the fact they had never helped him and had actually believed he was guilty, she decided that she might bring him along with her. But not yet.

The Flamels were pretty cool for an elderly couple that didn't look an age over 35. Nickolas taught her Alchemy while his wife taught her Enchanting. It was these lessons that helped her create a way for electronics to work around magic. She immediately created a recreational and game room within the castle. Sirius absolutely loved it!

Second year had the arrival of Luna Lovegood and the annoying Ginerva Weasley. The girl far too annoying. She kept trying to complement her brother Ron and saying they were friends. She snapped and back handed the girl when she said that they had to be friends since she looked like her mother, Lily. She sent a letter to Arthur Weasley telling him to control his daughter or else she'll request a restraining order.

Everyone now thought that Weasley family wanted to squander on her money, much to the other Weasleys' embarrassment.

Aside from that, there were petrified that were going around the school. Milly, an elf she had having a look out, identified it as a first year boy named Colin Creveey who was possessed by a book. She managed to get the book and destroy it and found the Chamber of Secret and killed the basilisk, and harvesting it.

There she found Salazar Slytherin's library and his portrait as well. After a talk about her life and finding out Voldemort's real identity of the man, he decided to teach her as well. She had gotten another of his portrait and placed it in Potter Castle, so he could continue her lessons when not at school. He laughed when she told him about the Time Chamber and her training became brutal.

Nothing interesting happened during her third year, except the regular annoyances and progressing with her studies. Sirius was getting himself reacquaint with the world and she was still debating whether she should bring him or not.

A man named Remus Lupin who she briefly met at Sirius's hospital room was their new DADA teacher. She told the man clearly that being friends with her father didn't mean they would be all buddy buddy, seeing that he was perfectly alright with not seeing her. The man looked pathetic, but left her alone.

Summer break was when she had told Sirius of her plan. She had pretty much finished her preparations, but still needed to tie up a few loose ends. Sirius was shocked but beamed happily at her when she asked him to come with her and said yes. She was very happy and glad that she had asked the man who was probably the only adult she trusted was coming with her.

She had learned that the island was actually covered in a magical ritual and was transported by the Peveralls and when the last female had married into the Potter family, they built their ancestral home on it. Knowing that the entire island was coming with them made things easier and they simply put everything with the large castle.

The World Cup was amazing and even though she didn't play, she did like to fly and Sirius was a maniac when it came to the game. Then Death Eaters had to attack the stadium and ruin the cheerful atmosphere. Thankful she was never apart of the cross fire and thus they went back to the Black townhouse.

Sirius was beginning to sell all Black properties and store everything in Potter Castle. He'd give her a hug ever once in a while and she swelled in happiness in his obvious gratitude. She knew how he felt. They were both abandoned by those they trusted and she could have easily done the same to him, but didn't. She had finally realized that they had each other and opened up to him much more and he did the same.

The Tri-wizard tournament took place for her fourth and possible her final year at Hogwarts. Surprisingly, her name came out of the goblet and got the cold treatment from many people. She didn't care though and retaliated with equal vigour when people attacked her. She never went to detentions and people learned to stay the hell away from her especially as Sirius had retaliated by ruining families, both financially and politically. She'd admit it, she loved her godfather!

The good thing about the tournament was that she didn't have to attend any classes and abused the Time Chamber along with Sirius once she told him about it. She actually learned quite a bit from her godfather. He was a highly trained Auror before and it was different being taught by an actual person and not a portrait.

She managed to do well in each of the trials and went with her godfather to the Yule Ball, saying that he wasn't going to let some dead beat boy lay a finger on her. She laughed and wondered if this was what her father James would have done.

Her last trial was when things got a bit messy. Right when she had touched the Cup, she was whisked away, indicating it was a portkey. She was dropped off at a graveyard, where she had fought in quite a simple fight, where she simply stunned Pettigrew. Then she saw the deformed baby that was yelling curses at her and knew it was Voldemort. Thankfully she had dealt with all his horcruxes, or so she believed, and stabbed him with Gryfindor's sword, ending him for once and for all.

She grabbed Pettigrew and used the portkey to get back to school where she was grabbed by Sirius who was frantically checking her over and yelling cruses to anyone and everyone there for being 'completely useless mindless morons' and she couldn't help but snicker. She brought his attention to her passenger, making him gape and then beat the ever living shit out of him only to be restrained by the aurors.

She was questions and simply said that she was brought to a graveyard where Pettigrew was throwing curses at her and she managed to stun him and never bothered to stick around, so grabbed the portkey and left. Dumbledore kept asking her if anything else had happened and she shook her head. She knew what he wanted to know but she wasn't going to tell him, or anyone.

Except Sirius of course.

Her godfather told her that Dumbledore was gathering his old vigilant group, the Order of Phoenix. The old man asked if they could use the Black Townhouse and Sirius agreed, having already taken all the important things with him, so it was quite bare except for the necessities. They shared a laugh.

He told her that he had taken all the gold from the Black accounts and transformed them to gold bars, except for a few. She did the same and left a bit as well and they put the remaining money in a single account named Potter-Black. They had already given their proxy vote to the goblins to do whatever they wanted, much to their happiness and told them to do what they needed with the money. The goblins did a lot for them than anyone.

The Order of Pheonix had arrived and the Weasley family actually moved in. Molly Weasley had actually tried to order her around telling her to sleep with Ginny and clean the house. She was put in her place. And then Hermione Granger had came for some reason, since they were 'best friends' and all, which everyone knew was a lie. Ronald was another annoyance, but she simply flipped him over and kicked him in the balls.

She and Sirius had finally put everything in the Castle and since Kreature wasn't coming with them, he was tasked to take care of the Town house and he could literally do whatever he wanted to the people there, making the little thing grin manically.

So on July 31, 1995, Althea, Sirius, the Potter elves, the Black elves, the Magical creatures and everything else on Potter island had disappeared from the world, never to be seen again.

Hope you enjoy it so far. I plan on making this an Althea x Damon fic.