Rebecca had been waiting for what felt like forever for Snape. After Dumbledore had left she had quickly entered the potions room and assumed a position which she thought would be decent enough. The plan was to zap Snape with the spell, hope that he didn't feel the change, then leave after him and run for the Great Hall. She was hoping that Snape would take the most direct route to the hall, and not the way that she planned to go. Though, as it stood at the moment, it might be that Snape had already gone to dinner; he had been gone for quite a while.

The door burst open and hit the wall. A very irritated Snape came storming into his room, muttering under his breath. She couldn't make out anything, besides the words "Damned dog!". She wondered briefly if he had been near Fluffy again. She wasn't personally suspicious of Snape trying to steal the Stone. Dumbledore would already be on to him if he was, and from what she had seen of their interactions, Dumbledore trusted Snape. It did, however, mean that she was still trying to create a theory on why he would go there. It could possibly have been on Dumbledore's instructions. But that didn't matter right now. She had her own target to follow.

Snape seemed to have calmed from his rage a little, and was now sorting papers and such. She didn't have to wait much longer as he made his way to the door. Just as he passed by, she raised her wand and whispered the spell. She watched with glee as his hair morphed from its ordinary black to a dark purple. The sides and back had bright green highlights, where she hoped he wouldn't see. She then aimed at the back of his cloak. She pictured the image of someone from behind. Someone who wasn't wearing anything, and had a small cloud of green extending to one side.

Snape left with a sweep of his newly designed cloak. She sprung quickly but quietly from her hiding place, making sure the invisibility cloak was still around her. She ran underneath the cloak down several corridors till she came to the corridor that she would have been going down on a route back from the library. Here she paused, made sure there was no one her and pulled the cloak off. She stuffed it into the pocket of her sweater, and started to run again. She was turning a corner when she ran straight into someone. She looked up to see the back of one of the twins, their fiery hair being the biggest giveaway. That and Lee was with them. They all turned around when George grunted from the impact.

"Rebecca!" Lee shouted in greeting.

"Where've you been all afternoon then?" Fred questioned.

"We've been looking for you." George told her. "We were wondering how, ya know, it was going?"

Rebecca smiled slyly at them, "You'll see in a minute." She walked slightly ahead of the boys who watched her go with confusion. They caught up with her effortlessly and they all walked into the hall together. People were still coming into the hall, which made it easier for Rebecca to look less suspicious. It was on the main corridor that she had run into the twins and Lee. They took their seats at the Gryffindor table next to the trio, Neville, Seamus and Dean. It was the usual crowd of people that Rebecca hung out with.

Rebecca looked to the top table. Snape wasn't there yet but plenty of the other teachers were though. Dumbledore looked to be in a deep conversation with McGonagall. Rebecca ended up watching them for a moment. McGonagall was smiling, whether she realised that anybody was watching or not was an entirely different matter, but she was smiling, something which scarcely anyone had seen her do. The sight of her teacher so relaxed made her smile, it wasn't often that McGonagall showed her true self, but Rebecca always liked it when she did. Her strict and uptight attitude in lessons always scared her a little. Before she could realise it, McGonagall and Dumbledore were both smiling back at her. She snapped out of her thoughts, realised that she was still smiling, and gave a slightly sheepish smile while blushing. She didn't hold their gaze for long, but looked away and tried to catch what the conversation at her table had been about.

# # #

Dumbledore could tell that there was someone there. He knew that they were invisible, and he suspected that it was one of the four misfits first years. No one else other than Mr Potter and his friends knew about and had access to the invisibility cloak. Dumbledore had thought that it was only right that Harry owned something that belonged to his parents, other than his own physical features. Besides, everyone knew that he was a sport when it came to a bit of mischief, as long as it was harmless. The Weasley twins certainly took it upon themselves to use that to their advantage. He couldn't tell who it could be though, that was the trouble with invisible people. He smiled faintly at them and winked as he led Snape away. Unlike himself, he doubted Snape would be so forgiving to anyone who was under the cloak for hearing their conversation, even if it was by accident.

He led Snape away and parted ways after he was sure the student had moved. He smiled to himself as he took a slow walk in the direction of his office. It would do Snape good to be pranked once in a while; he couldn't think of any other reason for a student, most likely from Gryffindor, to be walking around the dungeons. He did have suspicions that it was his own daughter who had been under the cloak. He had noticed that she had been hanging around with the Weasley twins and Mr Jordan a lot lately. He had seen the three check in with her regularly, and despite them thinking they were being discrete, he saw everything.

# # #

Dinner would be the usual feast. The whole student body was sat before the teacher's table waiting to enjoy the food that the elves had prepared for them all. Minerva noticed the Weasleys twins, Lee Jordan and Rebecca entering the hall. They were later than everyone else into the hall. Had it been anyone else it would have passed out of her notice, but there was something about the look on their faces. Or was it that the Weasley Twins always had that look on their faces. She looked to the faces of the other two. Jorden, like the twins, usually looked suspicious. Rebecca, however, looked like she was guilty of doing something. Her eyes looked exactly like Albus' when he was up to something. Dumbledore was preparing to speak and rose from his seat just as the four entered the hall. Unknowingly to Minerva, Dumbledore was a good enough distraction for their late entrance to go mostly unnoticed.

Before Dumbledore could speak, Snape swept into the hall with his usual glum demeanour. Minerva looked on in horror, not at his demeanour, but at his hair. It was a deep shade of purple, but noticeably so, with bright lime green highlights throughout. Whispers and laughter spread throughout the hall as he passed all of the students. He sneered at as many people as he could. He turned to the side to go around the edge of the table, and Minerva saw what the cause of the laughter was. On the back of his cloak was the shape of someone's rear end. She looked at her fellow teachers to see that they all had looks of shock at this person's audacity, but humour lingered in their gazes as well.

It was only once he reached the head table that he saw his reflection in a plate. His face morphed from surprised to furious in an instant. His lips pulled back in a sneer and his eyes instantly searched the Gryffindor table. He noticed, as well as Minerva, the group of students who were laughing the most, and trying to discreetly high five each other. His burning gaze turned quickly and furiously to Minerva. Minerva sighed with dread. She would have to investigate, and she had a sneaking suspicion that it had rather a lot to do with the twinkle that had been in her daughter's eye. Snape wouldn't rest at any rate until the person was punished. And even though she was rather amused at the prank, it was very wrong of them to have done something like this.

# # #

"That was brilliant!" Lee whisper yelled.

The four of them had walked from the hall after the feast had finished. Snape had been the topic at every table during dinner. But now that there was no one listening to them, the twins and Lee were congratulating Rebecca on her success. The twins even admitted that it was something they hadn't had the nerve to do until the start of their first year (they had planned it during the summer).

Rebecca was about to respond to Lee, when a voice from behind them made them jump. The deadly calm with which McGonagall addressed the group made their stomachs lurch.

"Well, then we better talk about the brilliancy of your knack for trouble." Her tone was sharp. "Perhaps in my office."

The four of them shared a look when McGonagall turned her back to them and started off down the corridor. They all knew that they were in for it, or at least one of them would take the blame. Fred and George had already discussed with Lee what they were to do if ever something like this occurred; they were going to take the blame for it, but only this once. It was their gift to Rebecca for completing initiation, and now that they had seen the prank, daring to get Snape, out of all the professors to choose from.

Of course, Rebecca knew none of this, and as McGonagall held the door open to her office for them, she could feel her hands shake in fear of the anger that she was sure was to come. McGonagall took a seat at her desk with an exasperated sigh, before looking at them each sternly. When her gaze fell on Rebecca she couldn't help but look down. The twins, who were more accustomed to these looks, met her stare head on. Lee, although used to them, felt guilty and averted his gaze before meeting again.

"So," McGonagall started with a calm that put them all on edge. "Which one of you did this?"

"Ur-" Rebecca started but she was cut off by the twins.

"It was us." Fred said.

"I would have thought you would have recognised the genius behind our work." George added.

"Yes, quite." Fred agreed with his brother.

Rebecca stared at them in surprise. Her mouth fell open and she probably looked like a fool. She didn't understand what was happening. The twins were purposefully taking the blame for something that was quite clearly, she was sure, her doing. McGonagall seemed to hesitate, before she started to give them detention. She then turned to Rebecca and Lee and gave them a warning to behave and not let the twins influence them. Rebecca had nearly giggled at that; it had been completely the twins influence. When they were dismissed they filed quickly out of the room, and headed down the corridors to go to their dorm room.

"I can't believe you did that." Rebecca said in awe at the twins.

"Well," George said. "We couldn't let our newest member be penalised on her first mission."

"Could we?" finished Fred.

Rebecca grinned back at the twins and Lee who were smiling as well. They made it to the tower and sat for a while in the common room laughing about what Rebecca had done. The twins praised her for her genius and said that she was nearly as good as them, but not quite; they promised that would be fixed easily with some quality training while in the field.