So to new readers, this entire thing was a whim that kinda just kept writing itself, so I did something I've never tried before and let the readers decide who the main pairing was, and much to my (complete and utter lack of) surprise a twincest pairing between HarryxLillith with Hermione thrown in was the number one request.

Now me personally? Not something I normally get into, so it's actually going to be an interesting journey for myself since I'm leaving a comfort zone, plus it's not technically incest at least from Lilly's point of view, she grew up in another universe never knowing Harry so it's less squicky for her. Harry though? Heh, that kids gonna need mind healers by the end of this, anyway enjoy and REVIEW!

EDIT 10/21/2017- Apparently people want this updated, so I'm going to re-edit all the chapters before I do so in the hopes that the past format stops giving me a bloody headache.

Harry Potter rubbed his scarred forehead in weary irritation, it was a nervous tick that he'd picked up over the years and it was nearly always precipitated by his twin sister Lillith.

He loved his sister, he really did, but she was just his antithesis in so many ways, he was smart, she cut with the dull edge of the knife, he was cunning, she was a simpleton, he was brave, she was craven, he was chaste and if rumours were to be trusted she hadn't been since she was thirteen. Now their most recent argument had left him with a palm print on his face and the harpies bitching ringing in his ears.

Sighing he lifted his glasses to rub the bridge of his nose when a gentle voice startled him, "She's at it again isn't she?"

Turning around he smiled down at his little sister, Iris was still a bit short for her age but the almost yet not quite twelve year old redhead held their mothers calculating gaze in her hazel eyes.

Sighing he nodded in reply, "Apparently her boyfriend dumped her for someone who would...be more willing to meet his physical needs..."

Iris snorted while rolling her eyes, "What she not enough of a skag for Dean? I figured the village broom stick would be plenty for him."

Shooting her a withering glance Harry seethed out through clenched teeth, "Please do not speak of our sister like that little flower, please..."

Iris stared at him appraisingly a moment before shaking her head, "You have so much faith in someone who doesn't deserve it big brother, mum wants to talk to you, apparently about your birthday preparations."

He nodded to the disturbingly intelligent preteen before he made his way through Potter manor.

He honestly detested the enormous ancestral home of his family, since the day his grandmother Dorea had thrown her life down to save he and his twin from the psychopath Dark Lord Voldemort the building just felt...haunted.

As he approached his mothers lab the Unspeakable could be heard arguing with his Aunt Bellatrix, "No Bella for the love of Morgana you can't mix those two runes and you know it."

The musical voice of his aunt replied in a diffident tone, "And why not, the end result will be more than a bit entertaining."

Lily Potter sighed loudly before responding, "Because it will open a Hellgate to the Other World? You do remember what happened last time that we did that yes?"

There was a pause then a bit of excited clapping, "That was when Remus and I had to fight our way through a legion of ancient zombified centenarians and French foreign legionaries right? Such a lark!"

There was another pause followed by what could only be a forehead meeting a desk, "Yes Bella...that's what happened, helluva honeymoon that..."

Harry decided to save his mum from his Aunt's ministrations by knocking on the door quickly before pushing it open, the redhead looked up to her son and smiled brightly.

"Hello honey, I see Iris found you, I was wondering what you and your sister would like for your birthday?"

Harry sighed as he leaned against the door frame, the Boy-Who-Lived (Merlin he despised the moniker that cost his grandparents their lives) nervously rubbed his scar again before replying.

"You know Lillith mum shes...well I'm sure she'll be ok with anything you lot plan out..." snorting internally he barely restrained the followup 'So long as it's cock shaped,' grimacing at the thought he met his aunts lilac gaze as she grinned widely.

"Don't worry my dear boy, everything changes soon, it is your fifth year of schooling coming up after all." Snickering to herself Bella turned back to her lab bench as Harry shook his head and bade the pair farwell, moving to his own rooms he paused at Lillith's door hearing the bathwater running.

Deciding to just wait to speak to her till the morning Harry shucked off his robes and threw on his pajamas, tossing his glasses on the nightstand he crawled into bed staring at the ceiling. As he glanced out the window he saw a falling star shoot across the sky, smiling sadly he closed his eyes to think a moment.

"For my birthday I wish upon the falling stars that my sister was my equal, I wish I had someone who could understand what I have to go through, and not hold my hand through it, but stand at my side..." with that he slipped into the realm of Morpheus, having no idea what he had just done.

Lillith Dorea Potter-Black, the Lady of Slytherin, the Girl-Who-Lived, the Dark Lady Anachain was grinning viciously as the ministry hit squad to her right exploded in a wave of viscera and fire. Neville was smirking slightly as he admired his handiwork, Lord Gryffindor always had a penchant for blowing shit up in a rather dramatic fashion; not to be outdone she threw an over charged Reductor curse scattering more hit wizards and their severed limbs across the lobbies floor.

The unfortunate truth of the matter was her insurrection had failed all thanks to that bastard Dumbledore, she'd played her cards just right but the bloody Dark Lord had no compunctions about mind raping her apprentices still in Hogwarts thus leading her plans to ruin. This was the only chance she or any of her UnSeelie court had for victory after three months of purges, either take the Hall of Time to set off a specific runic explosion over the central hourglass to send them back a decade, or die trying.

Lillith's eyes glowed with rage a moment after that thought as she saw young Colin cut down with a killing curse courtesy of a ministry flunky, that mouldering goat fucker had authorized unforgivables it seemed.

Turning to Hermione she motioned sharply, "Plan C6, meet at the lifts," nodding her second in command tapped her wristwatch three times when the entire lobby of the Ministry exploded in hellfire. The precast Fiendfyre ripped through the enemy reinforcements as her troops rushed to the safety of the lower levels.

The group filed into the open lift and slammed the doors shut, as the dozen survivors breathed heavily leaning against each other the only thing to break the silence was the awful overhead music. Their respite was short lived for not a second following the lifts stop they were sprayed with spell fire, Draco and Luna fell first, the latter screaming in agony as her flesh was burned off by soul fire.

Lilly shed a tear as she slit Draco's throat, not wanting her long time friend to suffer from the withering curse that had hit his heart while Hermione had cast a Czar Bombarda down the hall, the most powerful of all explosion curses echoing through the building sending dust scattering from the rafters.

Their group ran through the smoke and flames when the old goat appeared as if himself a wraith, he cast a gray colored spell directly at Lillith when Neville knocked her aside, her god brother screamed in defiance as the spell enveloped him. Red fire ignited from the dying boys eyes and the last thing the startled Dark Lord Dumbledore saw was the last scion of Longbottom shoving the Sword of Gryffindor through his pompous black heart.

Sobbing Lilly was pulled through the opening portal by her last two subordinates, Ginny was bleeding from the stump of her lost left arm as she propped herself against the wall, the last living Weasley grinned to her Lady as her lifes blood soaked the floor.

"Run, do what you can, and don't you dare look back," she than smacked the panel next to the door slamming the portal shut, making to go back for the redhead Hermione hooked her arm around her waist and dragged her on.

"None of that you, we're all that's left, we can't let their deaths be in vain, move it!" Caving in to her friend and confidant out of shock more than anything they found themselves in a room that reminded both young women of a roman coliseum.

In the center of the staggered stone steps was an ancient arch draped with a fluttering cloth, there was no other exit to be seen outside of the door they'd entered. Both exhausted witches were thrown backwards as the door exploded, more ministry flunkies filed in surrounding the pair of dissidents, dawning realization hitting the pair instantly.

"We've lost," Lillith whispered in shamed horror, Hermione for her part helped her friend to her feet as they stared down their would be killers, "I'm so sorry 'Mione..." the brunette glanced to her a moment before smiling wanly.

"In this world and the next I'll always be at your side," looking at the Lady Ravenclaw in confusion Lilly's eyes widened as she glanced to the veiled arch behind them before replying.

"Shall we see how far down the rabbit hole goes love?"

Smirking as she ignored the demands of the surrounding Auror's and Hit wizards Hermione quipped, "Curiousor and Curiousor dear Alice," and with that both witches grinned as they let themselves fall through the gate to no where.

Lillith awoke sputtering, sitting up quickly she sent a cascade of tepid water flying as she shuddered and flailed about in the unfamiliar tub. Coughing up gouts of water she gasped for breath as her nostrils burned, she threw her arms to the side of the tub and began breathing heavily, taking in her surroundings she felt her brow arc incredulously as she took in the opulent bathing room.

"O...k..." not exactly the most intelligent response but she really didn't know how else to react at the moment.

Shifting she stood from the pool of water and grabbed a towel, drying herself off she wrapped a soft robe around her shivering form and stumbled through the open door. She paused as she took in the bedroom before her, it was so...girly...so soft...so...weak, feeling the disgust roil in her chest she stumbled to the full length mirror and stared at herself.

Nothing changed outside of having no forehead scar and being a few years younger, no real complaints there, she was softer though lacking the hardened muscles she had earned through years of sports and warfare.

Confused beyond words she sat on the far too soft bed and after a time noticed a water stained letter sitting on the night stand, picking it up she read the first few lines and felt a headache coming on.

It was a suicide note.

Brows once again raising Lillith couldn't help sputtering out, "Wh-wha-what the literal fuck!? Drowning yourself over a boy leaving you?! What?!"

Instead of freaking out and hexxing everything in the disgustingly girly room Lillith centered herself and took several deep breaths, after a few minutes she let out a shuddering gasp.

"Ok...you've watched enough Star Trek to have an idea of whats going on here, apparently your mirror universe self was a bloody moron and now you've taken up residence in her head..." Pausing at that she rushed to the rooms desk and found every teenage girls constant, flipping the diary open to the most recent entry she couldn't help feeling even more gobsmacked.

"July 29 1995...that's...holy shit that's seven years ago..." Ok so not exactly the plan her group had come up with but well...it was something she supposed, mulling this over she looked around the room trying to acclimate herself. Stupid amounts of useless stuffed animals, check. Too much lace and no taste in decor, check. Red and gold color scheme rather than a proper green and silver, che-..."Bloody fucking hell, the stupid chits a Gryffindor."

With that the Dark Lady Lillith Potter began screaming into her pillow, after her moment of angst she spent the better part of the late evening and early morning reading her dead counterparts diary. If she were to be perfectly honest with herself she was half tempted to break into the ministry again and skip through the veil a second time.

"I mean really, how much can one girl whinge about her bloody life? She had her parents, she has loving siblings, what happened did she get dropped on her head one too many times as a baby? Ugh..."

Finishing the book around four in the morning she threw a wandless incendio at it removing the offensive tome from her presence. Standing up she began pacing frantically, "No resources, no reputation, useless friends...I mean really, Lavender Brown? Lavender Brown?! Ugh...Ok... ok ok we can work with this I circumvented two dark lords for years and only failed due to a slip of the tongue and happenstance, we can work with this."

Step One: Find out how badly this moron screwed up her life. Step Two: Find out what her family truly thinks of her and exploit it. Step Three: See if Hermione made it through with her. That one was iffy, Lillith assumed she'd taken over this body because it was vacant, the idea that Hermione in any universe would be suicidal was just...asinine. Mulling that over she eventually tossed her hands in the air, really what could she do at this point, she was just turning fifteen, second born behind Harry (apparently her twin, may wonders never cease) and for all intents and purposes a floozy.

Falling back on the bed she closed her eyes and let sleep take her, there was literally no reason to stay awake at this point, tomorrow she'd be running the gauntlet known as family, "Well...I'll just have to be Slytherin about it..."

Sighing she let her exhaustion take her as her world faded to black.

As it turned out she slept through most of the next day, either from magical or psychological exhaustion, or possibly both she remained dead to the world, all things considered this worked in her favor. She had supposedly just been dumped by Dean (was it Dean Thomas? She honestly had no idea Gryffindor's were kind of forgettable unless they were family or Weasleys) so sulking like an adolescent in her tacky as all get out bedroom seemed par for the course. She stared at the ceiling most of the day ignoring her family trying to come to terms with what she had to do.

"Well, for certain I'm not playing the part of my former renter, I am many many things but an easy lay I am not, so gotta dissuade everyone from that point of view right quick...bit of a shock sure but I'm not playing quaffles and bats just to keep up a repugnant image...hmmm..."

She considered her options and a sort of honesty may work, fewer questions asked and it could seem all noble and...Gryffindor'ish depending how she played it, and if she were to be honest playing her family would be infinitely easier then her classmates. Iris and her parents saw her three months out of the year and Harry had largely left her to her own devices so...hmm...well that could work.

Smirking she set an early alarm and sing songed, "May the games begin."

Harry shifted about as his body felt overly warm, cracking his eyes open he realized that the morning sunlight had been shining on his face thus awakening him, grunting he sat up and rubbed his eyes letting his hands fall down his cheeks in irritation.

Feeling the beginnings of stubble he decided to forgo shaving for the day, the obnoxious peach fuzz had given way to bristly dark hairs over the summer and he had found girls rather liked the rugged look. Slipping his glasses off he took a shower and dressed in some casual robes before exiting his room, whistling lightly to himself he made his way down to the kitchen and stopped dead in his tracks at what he saw.

Iris was at the kitchen's island table head cocked to her side brows raised in confusion as she watched Lillith twirl about the kitchen in the midst of making a rather elaborate breakfast, his twin spun and met his eyes causing her to stop dead in her tracks.

Emerald stared down emerald and of all the gods be damned things she blushed a bit as she turned back to the stove.

"Good morning Harry, did you sleep well?" Gawking at her incredulously he pointed to his twins back as he turned to Iris in confusion, the redhead just shook her head slowly obviously at as much of a lose as he was.

Sighing he shook his head muttering, "Well enough," as he took his place at the table. The trio were left in an awkward silence until Mum and Dad entered the room, the pair paused both looking shocked at the sight of their pampered princess of a daughter cooking. Lily stepped forward obviously worried the girl was going to burn the house down but she stopped mid motion realizing that nothing was amiss, cocking her head like Iris had she eventually spoke up.

"Good morning honey, you didn't have to make breakfast it is your birthday after all," turning around she met her mother's gaze evenly and Lily let out a slight gasp seeing the true affection and determined hardness in the previously vapid doe eyes.

"It's perfectly all right mum, you've all put up with me acting a prat since I went to school but...well, luckily for all of us that's no longer an issue, please take a seat breakfast is almost done."

Sitting next to James the couple exchanged glances then did so with their other two children, they both looked confused as well. Eventually Lillith served them all and gave herself an equal helping, another change, normally she only had a slice of toast and a cup of fruit to 'watch her weight,' digging into her meal with gusto her family soon followed her actions hunger overriding confusion.

Eventually James couldn't contain himself anymore, he was Chief Auror after all and the very idea that his beloved but not so bright daughter was suddenly acting...civil just set off too many alarms in his head.

Coughing lightly he asked, "So, Lillith, is there something you want to tell us all?"

Pausing she glanced up in fear at the pairs of emerald and hazel eyes, looking back and forth she blushed a bit before downing the rest of her black coffee. Coughing a bit she mumbled a bit straining her dads ears, "What was that honey?"

Clearing her throat again she sighed and leaned back before responding, "Promise not to get mad?"

Panicking he gasped out, "You're not pregnant are you?!"

Harry sprayed pumpkin juice from his nose as Iris and Lily winced, Lillith blanched looking aghast, "Morgana no I'm still a virgin for crying out loud!"

That...that brought pause and incredulous looks from her family, Lillith herself decided to gamble, this could either blow up in her face or seal the deal so she decided to go in all or nothing. When you were a Dark Lady, you knew when to take a gamble after all.

Sighing she pulled out her wand (at least it was willow like her old one) and incanted, "I Lillith Dorea Potter do so swear upon my magic and my life that I have not had any form of sexual relations with anyone in this universe, so it is said so mote it shall be."

Her family stared at her in absolute horror as Iris whimpered out, "Oh Goddess Lillith what have you done?"

Smirking at her little sister (who she incidentally thought was adorable) Lillith pointed her wand down the hall and simply stated, "Expecto Patronum!"

Her family reeled back as a massive thestral flew from her wand rather than Prongs, the majestic harbinger of death cantered down the hall before soon fading away, not being able to help herself she spoke up again.

"Huh...well...hadn't expected it to change since third year...gonna have to talk to Hermione about that..." At this her family all rubber necked staring back at her in awe, shrinking into her chair she resisted the urge to let out a weak 'Meep.'

Her dad was the first to recover looking very pleased with himself, "I'm...I'm sorry for judging you honey...I promise to not get angry...please tell me what is on your mind?"

Deciding to let a bit of her own anger bleed into her voice she snarled, "Well if you're all finished believing rumors I suppose I can share, that is if you're all willing to listen to me rather than others."

She didn't need to but she threw in a Snape sneer which made the quartet sit back in shock, good, keep them on edge, Iris spoke up next obviously confused.

"I'm...sorry Lillith, if you could please explain what's going on, what's with the sudden changes?"

Sighing she stood up and began pacing, this was it, if she could sell this she was set, "So Harry, tell me how many times has Voldemort tried to kill you in total, counting when we were babies?"

Iris squeaked and her parents winced while Harry's eyes narrowed, "Three times so far, last year was a change of pace in how boring school can be when you don't have a megalomaniac after you." Lillith cataloged that away for later, apparently the Triwizard Tournament hadn't happened yet or wasn't going to take place at all, interesting.

Nodding she continued, "Right, ok here's what it came down to, there was no way I could compare to the 'Boy-Who-Lived' no matter how much he hates the title. I would always just be his twin, so I used that. I played being a mediocre social butterfly staying in the shadows, I just faded into the background and drew no attention to myself. If I was invisible I could have Harry's back and no one, not even my family would know I was doing so, after all the grades we earn at Hogwarts mean nothing, they're simply a progress report to parents."

Turning to her family, heh...family...Lillith met each of their eyes then sighed again, "But now it's our fifth year...can any of you tell me what is special about fifth year?"

Harry spoke up immediately, "O.W.L's of course,"

Nodding quickly she began pacing again, "And what is the difference between Hogwart's term exams and O.W.L's?"

Lily gasped and Iris soon followed behind her, the small redhead cracked a wide grin before laughing out, "O.W.L's are a matter of public record and are required for you to find a decent job, so if you don't throw them everyone will know how good you really are."

James and Lily stared at their eldest daughter in dawning respect as Harry openly gaped at her, "Right, well that's the simple answer, what changed is the mask I wore to stay in the shadows will no longer work if I want to do something other than be a homemaker, and since the very idea of that makes me want to scream well..."

She shrugged sheepishly then retook her seat.

The ravenette shifted uneasily as her family reevaluated the girl they thought they knew, eventually James spoke, "You pranked us all...your family, friends, the entire school, you pulled a four year long prank on every person you know..."

The pride in his voice was as unmistakable as the tears at the corners of his eyes, coughing politely Lillith scratched the back of her head sheepishly.

"Yeeeeah, kinda," the rest of the Potter's stared at her for roughly thirty seconds before they broke out laughing, 'Ah, I still got it' the Dark Lady thought in amusement, now how to make the school think she wasn't a whore..hmm...figure that out after breakfast.

Eventually as the laughter died down James wiped the tears from his eyes and still grinning stated, "Well you're going to need a proper Marauder name aren't you?" Lillith calculated the benefits and gains of responding to this in kind, it could be useful to keep secret but something told her that her family wouldn't rat her out, throwing caution to the wind she gave her dad a half smirk that screamed 'Sirius Black'.

"Quill, my Marauder name is Quill," the four stared at her in confusion as she turned into her animagus form, as they gasped at the raven now hopping on the table she grabbed the slice of bacon from Iris' hand in her beak and hopped back to her chair. Shifting back to her human form with the bacon still hanging from her mouth she jauntily raised her brows up down causing the boys to break down into further laughter, Iris to giggle, and Lily to falsely scold her daughter.

"No walking on the table young lady."

Removing the piece of bacon from her mouth she actually looked a bit sheepish as she mumbled, "Yes mum," earning more laughter.

All things considered Lillith wrote the day off as a huge success, after clearing the table she began wandering the back gardens and eventually leaned against a tree losing herself in thought. This was how she found herself uncomfortably close to her brother as he startled her with his hand bracing against the tree leaning over her, for some reason she felt anxious as he stared into the mirrored gaze of his twin before the firm line of his lips broke into a grin and he kissed her forehead.

"I wish you'd been honest with me sister, I've thought you hated me these past four years."

Sighing in relief Lillith threw him a wane smile, "If my own twin questioned me than his enemies would-"

He cut her off shaking his head sending his shoulder length hair waving, "Then his enemies would think he was truly alone, you should have been a Slytherin," he quipped as he stood straight turning his back to her.

Unsure as to why she spoke Lillith quickly threw out, "I was supposed to be, you know, the hat wanted me to be Slytherin but I couldn't watch your back from the snake pit, so I made it put me with you."

He paused at that, turning his head a single brow arced as he gave her a heart stopping lopsided grin, "Really? Same for me, I just didn't want to be in the same house as that ponce Malfoy."

With that he shoved his hands into his pockets walking back to the manor, she followed her brothers progress as a Cheshire cat grin spread across her face, "You're far more interesting than one would think at first glance brother of mine, Curiousor and Curiousor..."

Pausing at the thought of Malfoy Lillith got an idea, according to the diary he was no friend of hers in this universe and destroying his reputation could very well help her lose her bad reputation; smirking she made her way to her mother's labs, time to make some polyjuice potion.