* AN: This story stub has not been beta-read.

Disclaimer: I DO_NOT own "Harry Potter" or "Ane Naru Mono" franchises. No profit is being made.

Harry Potter & Ane Naru Mono crossover :: Harry's Elder Sister

"Hey guys, have you seen the drawings someone made behind the sports shed?" Piers Polkiss asked as he met up with Dudley and the rest of the gang. "Totally freaky. I bet it's your cousin's work, Big D."

"Doubt it. Father had him do the chores all the time this past week." Dudley Dursley said. "But if those are like you say, I'm sure the Freak will just love them." He paused for a moment. "Why don't we show those to him?" He asked then. "Who knows, maybe it will finally make him go away to live with some other freaks, far away from normal people like us?"

"Sure, let's do it." Gordon said as he nodded in agreement along with the rest of the 'gang'.

Nine years old Harry Potter, the freaky little cousin of one Dudley Dursley, was sitting in a quiet and rather well-hidden spot underneath the stairs, hiding away from the world. It was lunch time, but of course he hadn't been given any food to eat by Aunt Petunia and no money to buy some in the cafeteria - 'freaks' don't deserve to have normal peoples' money.

His little peace and quiet didn't last for very long today, though, when his hiding spot was invaded by Dudley and his gang.

"Ah, Freak, what a surprise to meet you here." Dudley 'greeted' him, making the other boys let out a mocking laugh. "This is great, though. We wanted to show you something." Harry didn't know what exactly that something was, but he was quite certain that it wasn't anything that would be actually good for him.

"I… I'm good here." Even though he knew it was almost certainly a futile wish, Harry still hoped that the gang would just leave him alone. But the other boys weren't swayed by his words.

"Oh, but we insist, Freak." He said. Then, he turned towards the tallest of his cronies, Malcom, and commanded: "Get him." Harry tried to dodge the guy, but that was just impossible in the cramped space under the stairs they were in, and not a minute later he was caught. And dragged away by his head.

It was a painful 'ride' for Harry from there. And not a short one either: they were going all the way to the small and somewhat secluded space behind the school's equipment shed. And, of course, none of the teachers or other students saw any need to step in and save Harry from his current predicament.

Eventually, though, they reached their destination and Harry was able to let out a quiet sigh of relief - being dragged around literally by his head was …painful.

"What do you think about this, Freak?" Dudley asked, nodding towards a large pentagram someone had drawn on the back wall of the shed. It was surprisingly detailed for what could be a prank made by an unknown and all-too-bored delinquent. "Like it? Doesn't it feel like home?" Dudley taunted. "I bet you had these freakish drawings all over whatever mud hut your freaky parents lived in before they decided to kill themselves in a car crash." Knowing better than to contradict his cousin, Harry remained silent. "So you agree? Then why don't you kiss this thing and beg for it to take you to Hell? Maybe you'll meet your freakish parents were there."

And then Malcolm threw Harry at the wall, hard enough that it actually tore some skin off his forehead. And when Harry tried to get back onto his feet, someone - likely, Dudley - kicked him back into the wall, repeatedly, making his wound even worse. Being laughed at through all this wasn't helping Harry's situation any.

And then the bell announcing that the lunch break will be over in a couple of minutes rang.

"Guess, you're going to be late for the class too, freak." Dudley said before kicking his smaller cousin into the wall one last time. Then he and his cronies ran away, still laughing at what they just did.

Slumping against the shed's wall, Harry touched his forehead. He immediately winced from pain. Yep, he was bleeding. He couldn't go to class like this - not only was he late already, but the teacher would also punish him for bleeding all over the classroom. With a sigh, he wiped more blood from his forehead and leaned further against the wall, his bloodied hand touching the wall. And touching the pentagram drawn on it.

Now, whoever had drawn that thing did a good job. The summoning circle was actually a valid one - the only thing missing was a 'sacrifice' of Magical blood. And Harry had just provided it. He, of course, didn't actually see the circle activate, but he definitely felt his hair stand on end as the Magic of the summoning circle did its job.

Then, suddenly, the world around him grew darker as a cloud of black miasma surrounded him. A few seconds later, that miasma coalesced into a humanoid shape. It was tall and rather feminine, though definitely some sort of a monster: it had a pair of horns, clawed hands, hoofed feet, and its 'hair' was seemingly made of black tar-like substance yet kept moving in the way that defied gravity.

And then there was a 'necklace' of eyeballs. Actual, real eyeballs of different sizes and colors that kept glancing around, studying the surroundings.

Fearful of this strange being that came out of nowhere, Harry couldn't help but study it - her? - back. This was definitely something out of this world, something abominable in appearance and surrounded by dark malevolence. And yet, this 'girl' had a kind smile - one that Harry hardly ever saw directed at him.

"Good afternoon." The 'girl' finally broke the silence, her eyes now focused solely on him. "So, tell me… What is it you wish for?" Harry, however, found himself unable to form a response to this question. Which didn't escape the being's notice: "Oh my… How strange… Not kneeling or screaming at the sight of me, hm?" 'She' asked then. Harry had to admit that 'her' appearance was rather inhuman and a bit unsettling with all those extra eyes and tentacle-like hair, but he couldn't say he was actually afraid right now.

"W-What are you?" He finally managed to ask. This made the being in front of him let out a surprisingly good-natured chuckle.

"So, it is possible to be summoned by someone who doesn't know what I am…" 'She' observed. 'She' then leaned forward - giving Harry quite a view of 'her' assets in the process, though he was way too young to actually appreciate the sight - and introduced 'herself'. "I'm the Black Sheep of the Woods, rearing a thousand young. At times, your kind may call me a goddess, at other times - a demon." A demon? Well, 'she' did look like one, perhaps, but demons were supposed to be Evil, whereas 'she' didn't feel like one to Harry. "So, my young summoner, tell me what you desire. I will grant you a wish in exchange for what you treasure the most."

"Can… Can you be a better family to me?" Harry blurted out without really thinking. He was actually surprised that this was what he asked for, and so was the being in front of him.

"Be a family to you, you say?.." The Black Sheep of the Woods repeated. Then she leaned towards him even further and actually pressed her lips to his still-bleeding forehead. Instantly, the images of idealized family life, as Harry imagined it, flashed through his mind. With a more human-looking …'her' being something like a doting big sister to him. "I see… So this is what you desire. Very well. I swear to grant your wish without deviation and become your big sister." And then her form shifted towards something that could pass for a normal human. Her 'monstrous' aura receded and even her voice lost those otherworldly deep notes. "Tell me, my summoner, what's your name." She 'asked' then.

"H-Harry."

"A good name for a good boy." She said. There was a pause before she spoke again. "I shall be Chloe then, your big sister Chloe."

And so Harry's new life with a new family began.

~/ *** Two Years Later *** \~

If she were to be honest with herself, Minerva McGonagall was very surprised when the first Hogwarts letter sent to Harry Potter successfully reached its addressee and was responded to. And the said response was actually politely asking several rather-standard questions about Hogwarts itself and where one could buy the textbooks and other items one would need in order to attend it.

Given her impressions of the Dursleys family from ten years ago, she believed those 'people' would rather do their best to keep the existence of Magic - "unnaturalness" - a secret from young Harry for as long as they could. Perhaps she had misjudged them and Petunia managed to overcome her jealousy-turned-hatred towards her late sister?

Then, the Deputy Headmistress of Hogwarts saw the signature at the bottom of the missive she got from Mr. Potter's guardian(s). Who in Merlin's name was Chloe? Apparently, just "Chloe" too, no last name.

And wasn't Mr. Potter supposed to live at Number Four, Privet Drive?

Something very strange was going on here. And being the responsible witch that she was, she immediately headed out to investigate this.

Thankfully, Mr. Potter still resided in Little Whinging, Surrey, so finding his new residence wasn't that difficult. Especially when the house in question stood out that much among the others in the neighborhood. It didn't look too unusual, but there was a lot of rather chaotic Magic surrounding it. Enough that Professor McGonagall could practically see it swirling around the building. The Muggles walking by didn't appear to notice that - or the house itself - though.

Steeling her nerves, she approached the house and knocked on the door. Almost immediately, someone called 'coming' from within the house, and after half a minute the door opened. And Professor McGonagall found herself looking at a rather tall young woman, probably still in her late teens, with long black hair and rather …impressive assets which were thankfully properly contained by her simple pink dress. This girl looked rather normal, but the witch couldn't shake off the feeling that something wasn't quite right about her.

"Ah, you must be from Hogwarts." The girl observed. "Do come in."

"Thank you." Minerva said, before stepping into the house. It looked rather normal on the inside though, once again, there was a lot of Magic everywhere in here. "So… You must be 'Chloe'?" She asked then. The girl nodded, only to find a wand pointed at her. "Now tell me who you are. I know for sure that young Mr. Potter doesn't have any living relatives going by that name."

"We aren't related by blood, but I'm Harry's big sister by mutual choice. I will not let anyone question this… arrangement." The girl replied, not showing any signs of being intimidated. Her previous friendly demeanor though completely disappeared and was replaced by cold determination.

So much, in fact, that it must be making her see things - Professor McGonagall thought. She just couldn't come up with any other explanation why 'Chloe' suddenly had a pair of curved horns on top of her head. Or why her eyes now were yellow and with horizontal rectangular pupils. Or why she had more eyes appear in the middle of her chest. Or why her hands were now dark and clawed. Or why her hair was turning into levitating goo-tentacle-things.

"Is everything alright?" Harry - definitely looking healthy and well-cared-for - asked, peeking out of a guest room. He either didn't notice his 'sister' looking like a monster, or didn't think that it was something frightening or abnormal. Which only further convinced Minerva that she was imagining things.

"Everything's fine, Harry, dear." 'Chloe' replied, back to being a kind and gentle big sister in an instant. "Just talking a little to a Professor from Hogwarts before they answer your questions about the school."

Seeing that she was clearly losing this battle, Minerva returned her wand to its holster and followed the strange woman-maybe-monster into the guest room where Mr. Potter was waiting for them. Still, she resolved to investigate this 'Chloe' thoroughly later. Something was definitely not right here…

But for now, she needed to introduce Harry Potter to the world of Magic.