Disclaimer:I do not own Harry Potter
Chapter one- Cassidina Lillian who?
"Boy! Get up and cook us Breakfast!" Screeched Petunia Dursley, the matron of number four Privet Drive. Harry rolled off of the tiny cot in the smallest bedroom and scrambled around for some clean clothes. After throwing on a whale sized shirt that was once a bright red, but had faded to a soft pink and some large jeans with some ripped holes in the knees, and some twine rope tied to hold them up, he scrambled downstairs and scooped up the mail as he headed into the kitchen to cook breakfast. He was just at the doorway when he came across an unusually thick parchment envelope with bright loopy emerald writing that could only come from a Hogwarts letter. Tucking the thick envelope into his pocket, he meandered into the kitchen to fry up some bacon, eggs, and sausages.
After serving up the plates of breakfast, and downing some toast and water, Harry collected the dirty dishes and washed them by hand, as the Dursleys had decided that a dishwasher was too good for the 'freak', and that he should be grateful that they allowed him to live under their roof in the first place. Vernon finally left for work, and Dudley left to go to the Polkiss' house to go show his friend Piers something really cool that he got from his Aunt Marge in the mail for his birthday. Petunia sniffed at the spotless dishes being stacked into the kitchen cupboards and told Harry that they were barely acceptable to eat off of and that he should do better next time, and left to watch the neighbors plant their new garden.
Harry seized the opportunity to dash to his room and rip open the Hogwarts letter. It held the usual drivel about school and his book list as well, and then he noticed an extra bit of parchment. His curiosity overtook him as he unfolded and read,
Dear Mr. Potter, your presence at hogwarts is required on the 31st of August as something of great importance concerning you has come to our attention. Please be ready at 10 am for a trusted staff member to come and Transport you. The password you should look for is, "The Order of the Roasted Chicken sends their well wishes". Enjoy the rest of your summer,
Sincerely,
Headmaster Albus Dumbledore (Order of Merlin, First Class, Grand Sorc., Chf Warlock, Supreme Mugwump, International Confed. Of Wizards)
The rest of the weeks remaining until Hogwarts passed with little importance. Finally at 10 in the morning on August 31st, Harry opened the door to find Professor Snape holding a chewed up dog Frisbee and venomously announcing, "The order of the Roasted Chicken sends their well wishes." Harry could only stand there floored as he gaped at his teacher whom was dressed in a pair of black muggle trousers wearing a black button down shirt with a long obsidian coat slung over his right shoulder.
"Well potter are you going to stand there and imitate a fish or are you going to invite me in?" Professor Snape asked curtly. Harry snapped out of it and stood aside muttering a feint come in.
"Potter where are your school things?" Snape sneered, not wanting to be there any longer than absolutely necessary. Harry wordlessly pointed to the locked cupboard under the stairs. The professor then realized that Harry hadn't been able to access his school things all summer. A quick Alohomora and then a shrinking charm later, and the Professor thrust a mini trunk and owl cage at Harry, growling at him to put them somewhere secure so they didn't fall out during their trip.
"How are we going to be getting to Hogwarts Professor?" Harry ventured quietly. In reply the snarky professor thrust out the chewed up fanged Frisbee that he'd been holding earlier, and told him to touch it. Once he was sure they were both in contact with the repulsive toy he called out,
"Hogwarts, Jelly Bellies." The portkey twisted the environment around them until it was just a blur. Harry's feet slammed onto the floor in the headmaster's office and he fell on his bum trying to orient himself to his surroundings. An aged hand came swimming into view in front of Harry's face, and he craned his neck up to find a beaming Albus Dumbledore wearing bright green robes with white unicorns prancing around on them.
"Hello Harry m'boy." The headmaster exclaimed cheerfully. Once Harry was on his feet he was immediately seated in front of the headmaster, with Snape no-where in site "Lemon Drop?" the headmaster inquired. "No? Well more for me then," he announced as he popped the yellow sweet into his mouth.
"Um Professor," Harry hedged not quite sure how to voice his question.
"You are no doubt curios as to the reason you were summoned a day early correct?" Professor Dumbledore spoke. Harry nodded relieved he didn't have to stumble through the sentence himself. "Well Harry, the fact of the matter is, one of my good friends at Saint Mungos contacted me saying he had a teenaged girl there with a curious lightning bolt shaped scar on her arm claiming to be a miss Cassidina Lillian Potter. We immediately performed a series of tests, both muggle and magical in nature only to find that she was your twin sister. I was stunned as Lily had informed me that her other child didn't make it, having died shortly after birth. It is suspected that Voldemort tried to kidnap her, and that Lily faked her daughter's death for whatever reason, however we cannot be sure. I asked to have her transferred here to finish her recovery knowing you might like to see her. She has just recently been diagnosed as well enough to join classes at the start of this year." Harry didn't here this however as he was too busy trying to wrap his mind around the fact that he had a living breathing twin sister. "Excuse me Professor," he said breathlessly, "I think I'd like some time alone to think this over if you don't mind." "Not at all Harry, you may come down to the hospital wing when you're ready. Until then, you may place your belongings on your bed in Gryffindor tower, and the house elves will unshrink them for you."
The rest of the day passed in a maelstrom of strong emotions; joy, and anger among the most prominent. Harry eventually crept down to the hospital wing at midnight and peeked in to see a long head of messy black hair resting against the windowsill.
"Is it a full moon tonight?" He whispered. The figure whirled around and Harry came face to face with almost an exact copy of himself except that the copy was a female. She stared at him for a moment before replying that it was a gibbous moon, and that the full moon wasn't for another week. She then asked him for his name. "You mean you have no clue who I am?" he replied shocked. He pulled up the bangs covering his scar. "Does this mean anything to you?" He asked holding his breath.
"No should it?" She asked, her faced screwed up in a puzzled expression. Harry's face broke out into a smile.
"It's just…it's nice not to be recognized by a scar for once." He replied cryptically. "My name's Harry Potter."
"I'm Cassidina Pot… wait you're a Potter too?" she asked him, her emerald eyes sharpening.
"I'd venture to guess that you're my long lost twin sister then?" Harry said instead.
"Yeah." She replied dazed. "I guess so." Suddenly, a light went on in Madam Promfrey's office. Harry vanished under the silvery invisibility cloak and Cassidina feigned sleep. As soon as the coast was clear, Harry and Cassidina whispered their goodnights and Harry headed for Gryffindor tower, falling asleep as soon as his head touched the pillow.
The next day Harry and Cassidina wandered around Hogwarts getting to know each other as they waited for the Express to arrive in Hogsmeade station. Harry showed her some of the secret passages and trick doors to make sure she didn't get too lost on her first day. Eventually Hagrid fetched Harry and Cassidina and told them they could come down to Hogsmeade to pick up the first years and Harry would ride back in the Carriages with the upper years, whilst Cassidina would ride the boats with the first years. Once on the platform, a strong pair of arms surrounded his rib cage and a head of thick bushy brown hair pelted into Harry's face as Hermione clutched at him like a lifeline. Eventually Harry managed to choke out,
"Hermione… can't… gasp… breath." Hermione blushed at his words and released him, dragging him off to a carriage with Ron bumbling along whilst he told Harry all about the summer he'd had. After the golden trio had settled into the carriage it lurched forward setting along the path to hogwarts. Harry was attacked left and right with questions, why hadn't he been on the train, where was he on the 31st that he couldn't be at Diagon Alley, what was so important that Slimy Snape had to pick him up, things like that. Doing the best he could, Harry sidestepped the questions with cryptic answers and meek expressions, finally saved from the last one about snape as the carriage ceased it's motions and the door sprang open.
Dumbledore called the great Hall to order as McGonagall lead in the first years with Cassidina in the front. "Students! He called we have a new third year joining us this year she will be sorted first and then we will proceed to sort the first years as we always have. Please do not pester her with too many questions as she is recovering from a severe memory loss. That is all." Dumbledore then sat in his elegantly carved headmaster's chair as Professor McGonagall called out,
"Cassidina Potter." The great hall was a flurry of whispers as Hermione and Ron turned to scrutinize Harry. He nodded slightly to answer their unspoken question and watched the sorting hat on his sister's head.
"Well, well, another Potter. Perhaps you will be the one to do what your brother could not." The sorting hat cackled.
"And what would that be oh wise and mighty sorting hat?" Replied Cassidina sarcastically. "Ah, ah now that would be telling." The sorting hat replied, but you shall do great things in…"