Full Summary:
The Fates could have worked with Harry Potter, son of James Potter but when the chance came to steer Loki into Lily's path so they might conceive a child together? That was an opportunity too tempting to let pass.

Harriet spends the first 11 years of her life with no idea of the magical world or her mother's status as a witch. She would spend many years more ignorant of the heritage running in her veins but that blood will turn her greatest enemy into her most loyal ally. It is not until Loki comes to earth to fulfill his "glorious purpose" that the truth of her heritage will become known to her. Daughter will meet father and the destinies of the Avengers, Asgard, and beyond will be drastically changed. This is the future the Fates desire and they aren't beyond meddling to get what they want.

tl;dr Female!Harry is Loki's daughter and a goddess but doesn't know it. In using her blood to return Voldemort is magically forced through a change that leaves him an ally rather than an enemy. When the events of Avengers happens Harry gets involved and her heritage doesn't stay secret for long.

Part One takes place mainly in Harriet's 5th year covering Voldemort's resurrection and establishing the AU

Part Two starts at Chapter 21 and covers the events of the first Avengers film.

WARNING: Some characters in this will be LGBTQ+ There is no intended main pairing slash but these characters will be in this story so if that will be a problem for you I advise against reading.

Also, this is being cross posted from AO3. It is my first time posting anything on this site so please be understanding that there might be some bumps along the way.

Also, Also. I suffer from chronic health issues as well as dyslexia. Most of the time when I'm writing I am in pain and very tired. I do my best but it is pretty much guaranteed you will find spelling and grammatical mistakes in this story. Please, if you would like to point out mistakes made do so but don't let that be all your comment is. If you liked it enough to read it please tell me what you liked as well.

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Chapter 1: Harriet Fearn Potter

The Fates watched with bated breath as Lily Potter worked to deliver her child into the world. Had the babe been sired by her husband, the soul would have been born Harry James Potter to become The-Boy-Who-Lived. However, due to their meddling the child had been sired not by a wizard, but by a god. Lily Potter nee Evan's was giving birth to the first born child of Loki Odinson, Prince of Asgard, half-born child of the King of the Jotunn, Laufey.

Where one day Harry would have mastered Death and challenged Hela for her title, Harriet would walk a different path. Harriet Potter, The-Girl-Who-Lived would stand not as the Master of Death but the Master of Fates. Depending on how life shaped her she could be the making or the breaking of her universe. Thankfully for all the Fates would be watching out for their future Mistress. They would do all they could to guide Harriet in the hope of creating a future of reason and compassion.

...

At five years old Harriet Potter was struck by her Uncle for the first time. Without thinking about whether what he was doing was right or wrong Vernon reached for something handy and found a serving spoon on the table. Holding Harriet in place by the wrist he delivered ten consecutive blows to her forearm as she cried out and struggled. When he was done Vernon yelled at her that she was an ungrateful wretch who deserved worse for having gotten Dudley in trouble with her lies.

As you may suspect, Harriet had not lied and in no way deserved the punishment.

At school that day Dudley had been bullying his cousin just as he did at home. Mirroring his mother's words he teased Harriet for her messy hair and untidy appearance. Neither of these things were Harriet's fault of course. Her Aunt Petunia's hair was straight and fine. The woman had no experience in caring for hair like that which grew from the girl's head nor did she wish to learn. As such Harriet was never taught how to comb and maintain her curly locks in a way that would show them at their best. Instead after her bath nights it was combed down as straight as possible in the hope it might stay that way. But by the time morning came, after a night sleeping on it as it dried, the strands would be left in utter disarray which would worsen as the days past.

As for Harriet's clothes, Petunia and Vernon did relent to spending money on buying Harriet girls underwear and shoes. Everything else she received were second hand. The few precious skirts and properly sized tops she had were passed on to the Dursleys' when the neighbor's girl grew out of them but as these pieces were limited they quickly wore out. The rest of what Harriet had were Dudley's castoffs and her cousin was not one for taking care of anything he owned. By the time his clothes made it to Harriet they were often stained and patched or littered with little holes.

Being made fun of for her appearance hurt Harriet greatly as she was surrounded by a world that told her what little girls should be and she knew she was not living up to that. She dreamed of her aunt doing with her the things other mothers did with their little girls. Harriet dreamed her own mother was still alive to put her in dresses and put bows in her hair. But it wasn't to be. Instead she was left with her hair in a mess and one of Dudley's old t-shirts tucked into a threadbare skirt.

As her cousin and his friends mocked her Harriet stubbornly tried not to react but the tears still fell.

Dudley enjoyed seeing her cry. Feeling victorious egged him on further.

Reaching out he grabbed hold of a lock of Harriet's hair and gave it a sharp yank. With a harsh cry she reached up trying to protect herself but had no luck against Dudley's strength. Thrilled with himself Dudley gave a second harder yank that tore the hair from Harriet's head. As the strands came away threads of invisible magic left with them, traveling out to wrap around Dudley's wrist before sinking away to where the Fates could quickly gather them for use. Sadly they could only use them in altering Dudley's future but they worked within that limitation to their best advantage.

Across the playground Mrs Roman, the children's teacher hadn't noticed Dudley and his friends herding Harriet off and out of sight. She was distracted with matters outside of her job and so lost in her worries she didn't even notice one of the children's jackets laying abandoned in her path. Stepping down on the smooth fabric of the windbreaker she slid nearly falling down flat on her face. Scowling Mrs Roman picked up the hazardous garment. Examining the tag she found the name Dudley Dursley written out in clear neat print. Normally she would have kept the jacket and returned it to the student when play time was over but on this day she was too frustrated for that.

Striding off Mrs Roman went in search of Dudley. When she found him she wasn't at all pleased to see the large boy picking on his cousin. The Dursleys had warned her that Harriet was trouble but if this was how Dudley regularly treated her Mrs. Roman could see why the girl might act out. As a woman who had been bullied heavily by her older sister Mrs. Roman saw herself in little Harriet with tears running down her face as she struggled against her sneering cousin who shoved her around while the other boys stood around egging him on.

Stalking forward Mrs Roman demanded, "What is going on here!"

As Dudley knew she was coming he quickly dropped something from his hand. What exactly it was Mrs Roman couldn't make out at first but as she moved closer she could see that it was hair laying on the pavement. Long, dark, and tangled strands that certainly didn't come from Dudley's head. Fuming Mrs Roman unthinking about propriety reached out to search Harriet's head and subsequently found a bald spot near the front. The discovery made her even more cross with the boys.

For the first time in Harriet's memory people were punished for hurting her and Mrs Roman was not lenient about it. Not wanting this to develop into a habit she punished the boys to the full extent she was able and contacted their guardians to let them know what happened.

While all the parents were unhappy to learn that their children were in trouble for bullying, it was only the Dursleys who thought to blame the victim. They accused Harriet of having lied to get Dudley in trouble. A single thought on the matter should have told them that Dudley had done the things he was accused of. If they wanted to protect him from further punishment they should have been discouraging him from harassing his cousin. Instead by punishing Harriet that night Dudley only learned to continue this behavior. This lesson would cause him to continue to get into trouble for years to come, leaving him with a bad reputation and very much friendless as parents didn't want their children hanging out with "that Dursley boy."

As Vernon brought down the spoon on Harriet's arm tendrils of magic traveled out from her just as they had with Dudley earlier that day. These unconscious releases of magic had been happening since Voldemort attacked her with the Killing Curse with the Dark Lord being her first victim. On this night her strands of magic traveled over the spoon to Vernon's hand where they sunk down through his skin into the foundation of his being to where the Fates hands eagerly awaited them. They did not care for the way Harriet was treated in her relatives care and so took great satisfaction in punishing them.

The next day when Vernon came into work his boss, Mr Grunning watched him. There was a job promotion available. It should have be an easy decision who to promote. Vernon was the most senior candidate. At their company this usually meant everything. The other candidate was young blood full of ideas who didn't have loyalty to the company. There was a good chance they might loose him if he didn't receive this promotion. Being a man and a company of old values Mr Grunning had left wok the day before ready to give the promotion to Vernon and say good riddance if the boy decided to leave... but that night he found himself unable to sleep as he spent hours second guessing his decision. Vernon was a loyal employee but did that mean he would be what would serve the company best?

It was a few days later that Vernon learned he had been looked over for the promotion. He was furious. This was only a small example of the bad luck that kept landing on the Dursleys over the last few years. While none of these events could logically be blamed on Harriet the Dursleys always came to lay the fault at her feet. In a way they were right. It was because Harriet was with them that many of these things happened but the blame truly belonged with the Dursleys. Had they treated her well they could have enjoyed a far better fate. Like Mrs. Roman.

The day after the hair pulling incident Mrs. Roman noticed that the way Harriet's hair was laying displayed her new bald spot rather than hiding it. The state of Harriet's hair always bothered her teacher but she'd dismissed it. Curly hair was required particular car and children were usually interested in things other than keeping up appearances. However seeing the bald spot made Mrs Roman decided to see about helping Harriet with her hair. With the girls permission she gently disentangled and combed out her curls while the other children played. As they sat they talked about Harriet's hair and what she should do for it.

For the first time Harriet could remember someone was taking the time to teach her how to care for herself. Brushing her teeth, learning to wipe, and washing herself had all been things she learned by overhearing Petunia's lessons to Dudley or from kids programs and her time at school. It was also the first time Harriet could remember someone besides Mrs Figg touching her with kindness. The cat lady who sometimes watched her would occasionally pat her on the head but that was nothing compared to the continued gentle touch and instruction of Mrs. Roman.

While the teacher worked on her head strands of magic left Harriet continuously to tangle around Mrs Roman's fingers and sink into her part in the tapestry of the universe. Dozens of these strands were given that day which the Fates dutifully collected to use in reweaving Mrs Roman's fate.

That night it was revealed to Mrs Roman that her husband had been cheating on her for years. She cried and yelled but when the arguing was all over she found it in herself to tell him that she could forgive him, with time. She was willing to work on their marriage. It was as she was talking about counseling that the Fate's work came into play. Even while he nodded in agreement Mr Roman realized that while it may have been easier to stay married, he didn't wish to. The next morning he brought down a set of packed luggage to the breakfast table. With a glass of orange juice in her hand Mrs Roman was informed her husband of eighteen years was leaving her. When he left that morning the path to a happier life opened ahead of her.

That summer she met the man that would become her second husband. A man who would spend his life loving her completely and unconditionally. He was her partner in every way. He never thought to stray or take her for granted. Had she still been married the two would never have met, but they had. They met, they married, and ten months later they became parents. Her miracle baby. The one thing she always wanted. Something doctors told her she would likely never have.

Using the last of the threads Harriet had gifted her teacher the Fates saw to it that both mother and daughter made it safety through delivery.

For years the Fates were able to use the threads Harriet unknowing gave until at eleven years old their little Mistress learned she was a witch. Magic was largely a matter of belief. This is why confidence was so important to spell casting and why so many of the greats were arrogant. Once Harriet believed a wand was essential for magic her instinctual use of her gifts ceased. Without the strands she bestowed on others The Fates had a much harder time altering the weave of the universe. Fortunately there were still Prophets that could help to impose the will of the Fates onto the universe.

Contrary to what the mortals of Midgard believed prophecies delivered with their voices through Prophets mouths were not a prediction of the future, but rather a kind of curse. All prophecy was in a way self-fulfilling. If no one ever believed in a words then it would never come to pass. But if it the words were known and believed if only slightly a person's belief would help to direct their life's course to see the curse fulfilled. The more feeling behind the belief the greater the change and if that person had magic? Magic after all was influenced by belief. If the person believed then their magic would fuel the curse keeping it strong and encouraging others to believe the words as well. This is why The Fates were so choosy about when prophecies would be delivered. This is why they waited until Sybill Trelawney was in front of Albus Dumbledore before having her deliver Harriet's prophecy. It is also why they used all the influence they had to try to put a follower of Voldemort's within earshot when the words were said so they could deliver it back to the Dark Lord.

Free will existed. People were free to choose. The Fates could place every conceivable encouragement to turn left and still a person might choose right. Prophecy didn't guarantee a future. People could choose not to believe. People could fight against the will of the Fates, but a betting man knew the odds were against a fighter because the Fates? They had gotten very good at getting their way. So while things became harder for them the Fates were still able to guide Harriet's path. They worked and maneuvered like never before to ensure the daughter would be in a position of power come the day her father returned and the universe took notice of Earth.