Part I

It has been a week into the term and the Gryffindor and Slytherin sixth years have potions together in the cold, haunted dungeons, much to Gryffindor's displeasure, on Friday morning. It was half way through the two-hour lesson when the wooden door banged open and two feminine teens entered, one of them holding the scroll. Everyone stopped what they were doing and turned their attention to them.

"Was it necessary to do that, Iris?" asked the brunette.

"Does it really matter? We get to miss half of potions!" the black-haired girl answered.

"That's not the point," her friend scoffed. "Spending over an hour just to redecorate your room is like arguing grandfather about Merlin knows what!"

The brunette passed the scroll to Professor Snape who was looking furious at the two.

"Anyway, what time are you finishing tonight?" asked the black-haired girl.

"6.00pm," her best friend answered.

"WHAT!" she practically screamed.

"DO YOU MIND?" interrupted the teacher. The two teens gave him a fed up look and continued back to their conversation.

"Professor McGraw didn't turn up on Wednesday for the lesson so to rearrange that lesson we added time to today's lesson. So instead of one hour and thirty minutes for tonight's lesson, it's three hours!" explained the brunette who is known as Ten.

"Am I going to have to believe that?" questioned Iris, the black-haired girl.

"You're going to have to believe that," nodded Ten.

Iris groaned.

"If you are quite finished with your chattering and disrupting the class," professor Snape interrupted once again, "I'll be taking ten points from Slytherin and you will join your partners and continue with the lesson."

"We are getting different partners?" repeated Iris.

"Yes, Miss Kolchak, you are getting different partners," his smirk didn't make things better either.

"Who are we working with?" asked the heiress of Dumbledore, sighing softly.

"Miss Dumbledore, you will be working with Potter and Miss Kolchak, you will be working with Malfoy," smirked Snape.

The two teens exchanged worried looks and stole a glance at Malfoy.

"Great!" Iris muttered under her breath. "Just great!"

"Don't worry," whispered Ten as she walked to her seat. "I've got your back," and she sat down beside the jet-black haired boy. "Hey," she greeted, watching Iris take her seat in front of her.

"Hey," he greeted back. "We're working on Veritiserum potion," he explained.

"Thank you," she whispered and checked what she had missed so far. "So where are we?"

Harry chuckled lightly. "I've added the beetroot, so we are going to have to wait for five minutes for the liquid to turn orange."

Ten nodded in understanding.

"Do we need to write a report or something?"

"After the potion is ready, we have one week to test them and write a report,"

"That's fine."

The duo spent the rest of the waiting time discussing about the potion, the pair of blue orbs glancing at the partner in front.

Iris Kolchak, a Slytherin, sixth year, bent down to retrieve her quill, a black feather with silver lining, similar to Ten's quill except she has a blue lining, and started writing the introduction of her report. She noticed that a pair of grey eyes was looking at her, making her feel uncomfortable.

"You would be useful, if you could read the first paragraph," Ten heard her say. Malfoy took the book Iris hand had been holding and whispered out the sentence for Iris to copy in his most husky, whispering voice. Iris couldn't hear what he was saying so she had to lean in closer just to hear. She didn't like this and she was hoping something like a miracle would happen.

"This is not good," Ten said all of a sudden.

"Something wrong?" asked Harry quickly, emerald eyes glancing at his partner's fair face.

"Them," nodded Ten, to Malfoy and Iris.

"I don't understand,"

"Lets just say that Iris isn't that comfortable around boys that much," stated Ten, looking over her best friend. She could feel anger boiling up inside of her, knowing Iris was about to explode for the two of them share a special bond; like twins.

"I've got to do something," said Ten. She turned to the boy beside her. "Keep an eye on the cauldron."

She took her wand out from the pocket of her skirt and she carefully leaned over her table, careful not to drop anything. Keeping one eye on the teacher, she pointed her wand to Malfoy's robes and whispered the incarnation, "Flamingham intercartum," and with a dull blast, Malfoy's attire was on fire. Ten grinned and quickly went back to her seat.

Soon the fire grew and the smell started to get to everyone's nostril.

"Do you… smell that?" someone called out. Iris looked down to where the smoke came from and was surprised that her partner's robe was on fire. Her brain stopped functioning, pondering on whether to tell Malfoy or not. Suddenly Malfoy yelled out, gaining everyone's attention, and he got out of his seat, trying to put the fire out.

"Guess not," muttered Iris, eyes gleaming with amusement.

Two voices were heard as water spray sprinkled on the fire and the giant flame decreased.

"Everything ok?" a greasy voiced asked the Blondie. Malfoy nodded, whimpering and gaining permission from Professor Snape, he was sent to the Hospital Wing. Snape looked over at Ten, who was also the caster who put the fire out and the heiress looked back questionably.

The head of Slytherin then turned around, after making no comment, and returned to his desk.

"You have fifteen minutes till the end of your lesson. Use that time to clear up," he spoke from his spot. Scraping was heard as everyone got up to finish the task. Iris felt a poke on her back and turned to lock gaze with a pair of blue orbs gleaming with laughter and winked at her. Iris just stood there, stunned, as her best friend got up to clear up.

-00-

The bell finally rang, ending the first two lessons and everyone quickly filed out of their classroom, stomach grumbling for a little snack.

The heiress of Dumbledore exited the cold and smelly dungeon, after bidding goodbye to the boy-who-lived and leaned against the wall, opposite the wooden door, waiting for her best friend, her eyes closed.

"I can't believe you!" someone shrieked. Ten grinned; knowing whom the voice belonged to and opened her eyes. But the next thing she knew, she was on the floor. One thing came into her mind: she has been glomped.

"Iris? Do you mind?" choked the brunette.

"Sorry," Iris grinned and got up, bringing Ten up with her.

"Thank you SO much for doing that!" the silver-eyed girl rambled. "I thought I would never contain my anger if he had continued any longer."

Rolling her eyes, Ten grabbed her best friend's arm and dragged her up the stairs and into the Great Hall a she continued to babble God knows what. Ten sat down in her usual seat and rest her head on her arms.

"Are you ok, Ten?" asked Iris, grabbing an apple.

"Are you done rambling," answered Ten. Iris blushed lightly. She hadn't noticed that she was talking nonsense non-stop as usual.

"You could have told me," she muttered.

"Remember last time I did that?" reminded the brunette. Iris flinched.

"Don't," she said. Ten nodded and grabbed a pear, taking a bite. She stopped chewing suddenly at hearing a very familiar voice. She nudged Iris, gaining her attention.

"What?"

"Listen," hissed Ten. And indeed the voices spoke.

"Does it hurt, Draco?" asked Pansy, a pug, sixth-year, Slytherin girl.

"Not really," was his reply. "Madam Pomfrey fixed it in no time. But my father will hear about this and when he finds out whom it was, that person would be expelled before they can say 'Quidditch',"

"Quidditch!" the two girls chirped bursting into laughter. Malfoy and his cronies, Crabbe and Goyle, gave them a look.

"I bet he's lying," muttered Ron Weasley, a redhead Gryffindor. "Just listen to him!"

"What I want to know is who did it," spoke a muggle-born. Before Harry could speak, the two girls entered the Gryffindor Territory and sat next to Ron.

"THAT would be moi," chirped Ten. Ron and Hermione looked at her as if she had grown another head.

"Who are you and what are you doing here?" asked Ron.

"Ron!" warned Harry.

"Tenebrae Dumbledore; Ten for short," introduced Ten, winking at the owner of the gorgeous emerald eyes.

"So YOU were the one who set the fire," beamed Hermione.

"Bloody brilliant," praised the redhead.

"Thanks," breathed Ten. Ron's light blue eyes travelled down to her tie, noting it was striped with green and silver. He let out a small yell.

"You're in Slytherin!" cried Ron.

"So much for making friends," muttered Iris, rolling her silver orbs. Something inside Ten's pocket vibrated and she dug her hands to grab it. She retrieved what seems to be a device. She flicked opened the lid. She read the message.

"Is that… a mobile?" asked the bushy-browned haired girl.

"Nokia 6600," answered Ten. She checked the time on her watch and nodded to her best friend; they both got up.

"I'll see you in class."

They bid the golden trip goodbye and left the Great Hall, chattering.

"What does she mean by that?" questioned Ron.

"Of course," cried Hermione. "We have lessons with Slytherin ALL day!"

"Double potions. Double DADA. Double transfiguration," sighed Harry, finishing his snack. The trio got up and headed towards their DADA lessons.

-00-

Everyone was chatting about the events happening in potions when the Golden Trio joined the end of the line. Harry noticed that the two Slytherin girls at the front were also chatting and sometimes stopped to listen to other students. Harry also noticed that every time someone mentions, especially the Gryffindors, "I wonder who did that?" both girls broke into identical grins.

But the chattering stopped when the victim came into view. Malfoy, Parkinson and the two gorillas, Crabbe and Goyle, came into view looking unhappy at the gossip and glared at every Gryffindor as if suspecting one of them to be responsible. He stopped in front of the Trio, a gleamed in his grey eyes as he stared at the boy-who-lived.

"Well?" he started.

"Well, what?" asked Harry,

"My apology,"

"For what?"

"The fire!" growled Malfoy.

"No way!" cried Weasley. "Beside, you deserve it,"

There were 'ooohs' ringing around the area.

"What did you say?" Grey eyes narrowed at the redhead. Ron started to feel his bravery slip away as he quivered under Malfoy's stare.

"You heard him," a feminine voice said. "You deserve it."

"Who's talking to you? You filthy little mudblood," snarled Malfoy.

Harry and Ron reacted instantly by drawing their wands and Malfoy took his own and pointed towards the two

"Expelliarmus!" two voices called out and the three wands from the boys' hand entered the two hands of the casters. The casters happened to be Tenebrae and Iris Kolchak.

"You," snarled Malfoy. Ten instinctively stepped in front of Iris, protecting her. Malfoy raised his hand, neck level and advance towards the heiress. Just as he was about to strangle her, a voice called out

"What is going on here?"

Everyone turned to see the door behind Ten opened and an adult was stood behind the two teens, looking down at the blonde.

"Nothing," muttered Malfoy. Ten handed him his wand back and was snatched out of her hand as Malfoy joined at the end of the queue.

"You all right, girls?" the teacher asked. The teens smirked and looked behind them to see a man of twenty, with black hair and soft chocolate brown eyes, grinning back at the two.

"David!" squealed the two girls, jumping into his arms. David chuckled, hugging the two tightly while the students slowly filed into the classroom. As soon as the last person entered, David lifted the two teens up as easily as picking up a feather and took them inside. He put them down in front of the door and closed it behind him. The girls giggled.

"Long time no see," he greeted.

"We saw each other two weeks ago, Dave," Ten rolled her eyes.

"I know, but it was too quiet," he winked. Ten lightly blushed. "Go to your seat," he ordered gently.

The two girls nodded and sat at a desk on the Slytherin side.

"OK, guys. Welcome to your first DADA lesson as you have started school yesterday," greeted the teacher to the whole class. "My name is Professor Kolchak and I'll be your DADA teacher for the year."

"Only a year?" whined the brunette.

"That's what I've assigned to do," nodded David.

"No fair," joined Iris.

"Sorry," he mouthed. "Anyways," he spoke to the class. "Today's lesson will be a project. Some may take a day; some may take a little bit longer in controlling this power. So we will have a month to practice and improve this project."

The class stayed quiet, listening intensely.

"The spell we are going to learn is way above Ordinary Wizarding Level and not many wizards achieved this," explained the black-headed man. "We are going to learn the Patronum Charm."

The class erupted into cheers except a few Slytherins. David just stood in front of his desk, chuckling.

"Alright, alright," he called out. "Settle down!"

The class quieten again.

"Now for starters, what is a patronum charm?"

Only two Slytherins and a few Gryffindors hands were up. David nodded to the heiress.

"A patronum charm is a spell that wards of Dementors and other dark aura/spirits," she answered.

"Five points to Slytherin," he nodded. "What form can the charm take?"

The same hands were raised. Professor Kolchak nodded to the boy-who-lived.

"It can be nothing, a wisp of smoke or can take any form depending on the wizard or witch's soul."

"Five points to Gryffindor," he praised. "And you need a strong happy memory to conjure a powerful charm." He looked down at each of the silent students.

"Harry, Ten and Iris. Come to the front, please," he suddenly spoke.

The three nodded and made their way there. They stood in a line in front of him and he bent down, almost level with them.

"I want you to perform the charm for us, can you do that?" he whispered.

The trio nodded. David addressed to the class once again.

"My three volunteers will show you what their patronum charm looks like and then you can have a go."

Harry stepped forward and took a deep breath. He closed his eyes and let his memory fill him up before snapping his orbs open and raised his wand.

"Expecto Patronum!" she shouted. A large wisp of smoke exited the tip of his wand and took form the next second.

"What animal is that?" one of the Gryffindor awed.

"A stag," the boy-who-lived answered. And the silver creature vanished, leaving a few vapour hanging in the air. He stepped back and let the girls show theirs.

The two girls nodded and raised their wands. "Expecto Patronum!" they cried and two silver creatures appeared: a unicorn and a phoenix. Everyone stare in awe.

"Thank you very much," David stepped in. "Ten points to each of you. There you have it," he called out to the class. "Three patronum charms; three creatures. Now it is your turn."

The three teens retreated back to heir seat.

"I want a mixed group of Slytherin and Gryffindor and of boys and girls: a group that has one Slytherin male and female and one Gryffindor male and female."

The class groaned as some of the chairs scraped against the wooden floor. Ten and Iris stood in the middle of the room, scanning to find other members for their group.

"Hey, Ten! Iris!" someone called them from behind. The two girls turned to see the Golden Trio. Ten and Iris nodded back in greetings.

"Got your two Slytherins?" the heiress asked. Harry shook his head.

"Dumbledore!" an icy voice called out. "I need you to do me a small favour."

The group turned to Malfoy.

"Like?" she quirked an eyebrow.

"Have Crabbe and Goyle in your group."

"No way!" cried Iris.

"Ditto. Find another guinea pig," snorted the brunette.

Not bothered to try and convinced them, the Blondie and his current girlfriend Pansy Parkinson, went off to find two Gryffindors to work with, much to their displeasure.

"Why can't we just work with whoever we want?" asked Parkinson. "When was the last time we ever listen to a teacher like him?"

"In that you are right, my dear," Malfoy smirked. "Let's go back."

Pansy rolled her hazel eyes and followed the Dragon back to the Golden Trio.

"Would you fucking leave us alone?" Ten hissed, anger blaring in her sapphire eyes.

"Why should I when there's fresh meat to attend to?" coughed the Blondie. You could almost hear a growl escaping Ten's parted lips if the classroom wasn't so loud doing the practical.

"Whoa! Who let the tiger out?" laughed the Slytherin Prince. Crabbe and Goyle guffawed stupidly.

Rolling their eyes, the two Slytherin girls turned to the Gryffindor Trio.

"Let's work in a five. This is not going to work out," sighed Ten.

"Fine by me," nodded Harry, leading the group to an empty space. They all walked in and out of the crowd to a far corner, near the exit door.

"To be honest, Ten, we all know how to do the Patronum Charm," shrugged Harry.

"Even them?" nodded Iris to Ron and Hermione.

"Even them," nodded Harry.

"Well we can just perform it once, and if it is rusty then we'll practice until it is powerful enough," suggested the heiress.

Following her instructions, the five of them draw their wands and at the same time, shouted out the incarnation: A phoenix, a unicorn and a stag were joined by a lion and an otter; the lion belonged to Ron and Hermione owned the otter.

"Cool creatures," beamed Ten.

Ron and Hermione blushed lightly.

Suddenly the bell rang, ending the lesson.

"OK, your homework is to do a small research on the spell. I want one roll of parchment done by next week," called the Professor over the noise of the students packing away. The Golden Trio and the duo were the first ones to exit the classroom and they headed for the great Hall straightaway for lunch.

"That was an ok lesson, apart from the fact that Malfoy doesn't leave us alone," commented the Muggle-born.

"Yeah. But don't forget, this is only the first lesson. Who knows what he could do for the rest of the year," huffed the silver-pools female. The rest of the gang nodded in agreement.

They arrived at the entrance of the Great Hall.

"Well, this is where we will part until the next lesson," grinned Ten. Her best friend and herself bid the Golden Trio goodbye and joined the rest of the Slytherin at the Slytherin table and served themselves.

-00-

"Welcome, Gryffindors and Slytherin, to your first Transfiguration lesson," greeted the head of Gryffindor, Professor McGonagoll. "Now as you may have noticed, there may be a few people that are not here in this class is because they are in the lower group of Transfiguration. In other words, you will be doing advanced Transfiguration while the rest of Gryffindor and Slytherin, sixth years do the original Transfiguration."

"Today's lesson will simply be turning a jewelry box into a mouse, using a three stage process." The Professor went to the board and with a wave of her wand the diagrams with explanation were written on the board. "Off you go." And with another wave of her wand, each of the students has their own black jewelry box.

The two Slytherin teens, who sat at the back of the classroom, dug out their wand from their pocket and read the instructions on the board.

"Lets do this," sighed the brunette. Ten tapped her box softly three times and said the incarnation, her wand pointed to the edge of the lid. "Unus Tempus Temporis."

An invisible liquid was poured against the jewelry box and the black became brown fur, the tinsel at the front of the box became a tail, the lid became the head and the rest was a body and two pairs of legs.

"Nice," complimented Iris. She turned and did hers. Her mouse and Ten's mouse were the same except Iris made her mouse black, as to not mixed up with the other mouse.

"Duo Tempus Temporis," this time, the girls added their own mouse a voice. Once the mice felt something strange in their throat, they opened their mouth, their front teeth sticking out, and started to squeak.

At the sound of squeaking, Professor McGonagoll went over to their table.

"Excellent girls," she grinned. "Now for stage three, add your own bits. Think hard on what you want it to do and say the incarnation,"

Ten nodded and thought hard at what she wants to see first. With a grin on her face she called out, "Unus Addo Duo Tempus Temporis," her wand pointed to her mouse. Immediately, the mouse stood on its back legs and started shaking his butt about, the tail swinging around.

Ten and Iris giggled at the dancing mouse. The Professor rolled her blue eyes and walked back to her desk muttering under her breath.

"Dancing," she breathed. "I should have known."

"Try yours," giggled the brunette. Her best friend nodded and did the same thing. Instead of becoming a dancing mouse, Iris made her mouse have special powers. The mouth opened and out came a puff of smoke.

"Ice power!" beamed Ten. "So cool!"

Her mouse had a grumpy features all over its face and started dancing again, moving closer and closer to the black rat until it bumped him out of the way. The brown mouse grinned innocently, while Iris scowled down at the creature.

Ten couldn't help it and burst into laughter.

"If you are done with experimenting, try and reverse the process," said Professor McGonagoll, rubbing her temple.

"Yes Ma'am," saluted the girls.

The girls pointed their wands to the active mice and muttered, "Duo Tempus Temporis."

The liquid appeared and stopped the active mice, making them normal with squeaky voices.

They then muttered, "Unus Tempus Temporis," and the brown and black fur balls returned back to the original Jewelry boxes.

A moment later the bell rang ending the class. Gryffindors and Slytherin stopped what they were doing and packed away their stuff, heading towards the exit.

"That was a fun lesson," chirped the owner of a pair of silver pools.

"Yeah," nodded her best friend. "And our mice were cute."

Iris giggled and the two teens entered the Great Hall for teatime.

"So, what shall we do?" asked one of the girls.

"I've got language class," grimaced Ten. "The fun part of that lesson is that I get to learn Russian."

"RUSSIAN!" Iris almost screamed. Ten flinched at the loud noise. "Why didn't you tell me?"

"You didn't ask?" cried the heiress.

"That is no excuse."

"That is no excuse either," Ten folded her arms across her chest.

"Fine!" sighed Iris. "Leave me," she made an attempt to fake weep when something or better, someone caught her hand. The two girls turned to the owner.

Grey eyes looked down at the black-headed girl, an unusual glint in his eyes.

"Hands off," the heiress's best friend snarled.

"Unlikely," he said casually. Then he felt something against his chest. A 6.2 inches, weeping willow with a hair of a unicorn, wand was drawn and pointed against the heir's chest by the heiress opposite him.

"Leave her," she growled.

Malfoy let go of Iris's hand and continued his way down the table to his seat where Parkinson was and sat down as if everything was normal. Ten and Iris traveled down the other end of the table, far away from the arrogant prince and sat down, eating their meals and chatting from time to time. With a lot of happiness in the air as well as the clatter of knives and forks and chatter, time went by fast.