New story! I hope this is a lot better than the summary makes it seem. It's gonna follow the story of Bianca as she goes through Hogwarts and possibly a little bit of her life after the war. She grows up wirh the Weasley twins but not knowing who her parents really are. Let's just say the truth is a little surprising. Enjoy! :D

Chapter 1

After a stressful day at work, one thing Mr Arthur Weasley was not expecting when he returned from work that night was to see a baby lying in the fields a few miles away from his house. Mr Weasley always apparated a little while away from the Burrow when he had had a particularly difficult day so he could walk through the fields, alongside the river to clear his head and calm down. So naturally, it came as quite the surprise to come across a sleeping baby on the river bank. There was no note, no little letter, nothing. Abandoning a baby when a war was brewing was not Mr Weasley's idea of good parenting.

His wife, Molly had just given birth to the twins, Fred and George, just over a year ago, and this baby girl couldn't be much older than the boys. Not knowing what else to do, Mr Weasley carefully picked up the child who promptly woke up and started screaming.

"Shush, now, little one," Mr Weasley said comfortingly as he rocked the baby, "Let's get you home, shall we?"

He hurried home as quickly as he dared while muttering quietly to the baby as he went. When he finally arrived back at the Burrow, he pushed open the door and placed his work bag by the kitchen table.

It wasn't long before his oldest son, Bill, came up to him, "Hello, daddy! Have you had a good day?"

Bill was nine years old and was always very eager to help his parents look after his younger brothers.

"Hello, Bill. I have, thank you. Do you know where mummy is?"

"She's in the living room with the twins," Bill said eagerly, "Why do you have a baby?"

Mr Weasley, however, ignored his curious son and made beeline for the living room where he found his wife wrestling with the twins who were climbing all over their mother to avoid the food she was trying to give them.

"Molly, dear?" Arthur said awkwardly, taking George off his wife's shoulders.

"Oh, hello Arthur, dear. Did you have a good- oh? Who's this?"

"I'm not sure," Arthur said while struggling to hold a squirming George in one arm, "I came across her on my way home, she was left by the river all alone."

"Oh, the poor thing! Here give her some of this food quickly."

Molly placed Fred on the floor and took the child from Arthur, "Oh she can't be much older than the twins! We must tell someone we have her safely."

"Molly, dear, we don't even know if she's a witch! She might be a muggle!"

"Arthur, that doesn't make a difference. Whether she's muggle or not, she was abandoned and we should look after her until someone comes to find her."

So the parents kept the child. They informed the Ministry of Magic who also informed the Muggle Prime Minister. But no one came for the girl.

By the time Molly had given birth to her sixth son, Ron, the Weasleys had decided to keep the baby. They named her Bianca and when going through paperwork at the ministry decided that her birthday would be the day Arthur found her: the 5th October. Bianca slept in the same room as Fred and George and the three quickly became inseparable. Mr and Mrs Weasley knew that they couldn't let the girl grow up without knowing the truth, so they never pretended that she was their real child, despite telling her to always call them 'mum' and 'dad'.

For reasons unknown, however, Bianca was very quiet. This surprised the rest of the family as she had such a strong friendship with the two loudest people in the house, but Bianca only ever spoke to Fred, George, Mrs Weasley, Mr Weasley (or mum and dad), Bill and Charlie. If Ron, Ginny or Percy were in the room, Bianca never opened her mouth. Although not knowing for sure, Molly and Arthur assumed this was because Bianca, or Bea, felt out of place in the Burrow. The poor girl didn't know anything about herself- whether she had magical blood or whether she was a muggle. She didn't even know who her parents were and it saddened Molly and Arthur that she probably never would.

Fred and George always stuck by her side. They always claimed she was brilliant, funny and kind, it was just a shame that the rest of the family never saw that side. The twins could go on for hours about their 'sister'. They'd say how good she was at coming up with pranks, how funny and original her jokes were and how she was so comforting and understanding if one of the boys was upset.

The bond between the three of them was unbreakable. When they were little, if one of them fell ill, the other two would crawl into bed and cuddle each other until they were all better again. They were never seen without each other; completely inseparable.

When she was old enough, Bea made the decision that she wouldn't take the Weasley surname. When George asked her why, she replied, "One day I want to find out who I really am and take my real surname."

So, Bianca grew up without a surname.

About ten years after Mr Weasley first brought Bianca into the Burrow, an owl arrived at the house with a bunch of letters tied to his leg. Mrs Weasley hurried to collect the letters.

Fred, George and Bianca all held hands under the table anxiously as their mother handed out the letters.

"Charlie, Percy…" Mrs Weasley handed the two boys their letters, "George, Fred and- oh Bianca! You have one too!"

Fred, George and Bianca all leapt to their feet and began dancing around the kitchen happily. They were all going to Hogwarts together. When the three of them had calmed down enough to sit back down, Mrs Weasley handed them all their breakfast.

"We'll go shopping tomorrow and get all your supplies so you're ready for September. Oh, Bianca isn't it exciting!"

Bea looked across the table at her 'mother' who was beaming happily.

After breakfast, she and the twins ran up to their room and Bianca squealed in delight.

"I can go with you!" she cried happily as she danced around the room.

"Alright, you don't need to shout," George joked. He always said this when Bianca inputted to a conversation as she was usually silent and subdued around other people.

"You know, Bea," Fred said, "We never would have left you here."

"Yeah," said George, "Even if you hadn't got a letter we'd have smuggled you to Hogwarts with us."

"Yeah, Bill would have helped us get you there and then we'd beg the teachers until they let you stay!"

Bianca laughed, "And what if they wouldn't let me?"

"Charlie says there are suits of armour in the castle," George started.

"We'd hide you in one of those and come and see you between lessons to make sure you were alright!" Fred finished.

"It doesn't matter now though," said George eagerly, "You're a witch too! We can joke and pull pranks and do everything together!"

"Except homework," Fred said, "Bea will do that for us, right Bea?"

"Sure," Bea said thoughtfully, "But when you fail everything it's your fault for not doing your homework."

Fred huffed, "How about we do it, then you check it?"

"Deal," Bea agreed and the three shook hands in a little triangle.

The next morning, Mrs Weasley left Ron and Ginny in the capable hands of Bill and shooed the others towards the fireplace. The group Flooed to the Leaky Cauldron and spent a very enjoyable morning in Diagon Alley exploring the shops. Uncountable time, Fred and George tried to run off to snoop around Knockturn Alley but Mrs Weasley kept a close eye on the troublesome boys and caught them time after time.

The small group left the shops a few hours later with empty wallets but bags full of Hogwarts supplies.

"You aren't allowed to use magic outside of school so you may as well put your wands away," Percy said haughtily upon seeing Fred, George and Bianca looking gleefully at their new wands.

"We're just looking at them Perce," Fred said while Bea stuck her tongue out at the elder Weasley.

"Besides," George continued, "It's not like we know any spells yet."

"That was Fred's excuse when he turned Ron's teddy into a spider but there's no other explanation," Percy snapped.

"That was an accident!" Fred shouted, "I didn't mean it!"

"It was still magic," Percy said, "You need to learn to control it otherwise you'll be a danger."

"Hush now, Percy," Mrs Weasley chided, "That's what they're going to school for, after all."

"I still don't know how Bianca is going to perform spells if she refuses to speak," Percy continued as if the girl wasn't there, "How is she going to say the incantation clearly?"

Fred and George balled their fists and Bianca scowled.

"Oi, Perce," Charlie said from a few steps ahead, "Shut your stupid know-it-all mouth for one second, will you?"

"Charlie!" Mrs Weasley exclaimed.

"What? Mum, have you heard what he's saying about Bea? I bet you anything she'll turn out a better witch than any of us." Charlie winked at Bianca and continued to walk behind his mother as they made their way back to the Leaky Cauldron, stumbling over the numerous bags they carried.

When they all returned to the Burrow, Bea, George and Fred all bounded up the stairs to their room to pack. There was still a week left before the first of September but the three were so excited, they simply had to do something. After collecting their hand-me-downs from Bill and Charlie (the refused to take anything which had belonged to Percy), they slammed their trunks shut and collapsed on George's bed.

"Well," said Fred.

"We only have a week left here before we head off to school," George continued.

"How about we cause a bit of chaos?" Fred suggested.

"Mum says there're gnomes in the garden again," Bea said, "We could put one in Percy's socks."

"Brilliant!" George exclaimed, "Come on, we have a garden to de-gnome."

Mrs Weasley was more than surprised when Bianca, Fred and George arrived downstairs offering to help de-gnome the garden.

"You're actually willing to help?" she asked, shocked.

"Well, we thought that because we only have about a week left at home," Fred started.

"That we should do something to make up for the painful months when we won't be here to offer our lovely assistance and provide entertainment and joy," George continued.

"So we thought we'd help get rid of the gnomes," Bianca finished quietly.

Mrs Weasley smiled proudly, "I'll get Charlie to help you, shall I?"

"Don't worry, mum, we can manage," George smiled but it was too late.

Charlie, who was already on his way to the kitchen, heard his name and hurried in, "Yeah I'll help. Make sure you don't miss any."

"Charlie watch they don't get bitten. Good boy."

Fred and George huffed and followed their older brother into the garden. As soon as the door closed behind them, Charlie turned on his younger siblings, "So why did you really offer to de-gnome the garden?" he asked.

"We wanted to prank Percy," George sighed, "But I suppose you'll snitch on us if we do."

"Don't be stupid, I'll help you! Percy needs to be put in his place. What's the plan?"

"We're going to put a gnome in his sock!" Fred explained excitedly, "It was Bea's idea."

"Brilliant!" Charlie cried.

Bianca blushed as she knelt down to scoop up a gnome from under a bush and throw it over the fence, "It's not the most original idea in the world," she said modestly, "And we did a similar thing once with Bill's underpants and a bowtruckle, remember?"

"I can't believe our little innocent Bianca has such a devilish brain," Charlie joked, "We can't underestimate her just because she doesn't speak."

"Silent but deadly," Fred laughed, causing the whole garden to fall into hysterics.

"I'm not silent," Bianca protested when she'd calmed down enough to speak.

"Yeah, not in front of us, you aren't," George said, "If only the rest of the world knew what a little fiend you are."

Bianca purposefully threw a gnome in the direction of George's head. With its stubby arms, the gnome latched on to George's ear where it clambered onto his head, slid down his hair and bit him on the nose.

"Ouch!" George cried.

"Oops!" Bianca said, shrugging, "Guess I let go too early."

Charlie yanked the gnome from his brother's nose and chucked it over the fence after the rest of them.

Not long after, the garden was emptied of gnomes and Charlie had one safely stowed in his pocket, "You go and tell mum you've finished," he said, "I'll meet you outside Percy's room."

"We did it, mum," Fred announced, "They're all gone."

"Oh thank you! Where's Charlie?"

"He came back inside," George lied quickly, "Said he got bored."

"Oh, that boy!" Mrs Weasley sighed, "Off you go, perhaps you could send Percy down to help me chop some vegetables for dinner?"

"Of course, mum."

The three ran up the rickety stairs to find Charlie standing excitedly outside Percy's room.

"Get him to go downstairs," George whispered, "Mum wants him."

Fred, George and Bianca hid around the corner while Charlie convinced his brother to go downstairs. Then, the four of them snuck into Percy's room. It took them a while to find his sock drawer as Percy seemed to have endless units full of work and books but finally, Fred opened a drawer to reveal dozens of socks which were all arranged in colour order and folded neatly. Charlie snorted and mumbled something along the lines of 'Only Percy' before taking a sock, unfolding it, and stuffing the gnome inside it. He lay the sock carefully on top of the others so as not to disturb the organised specimen that was Percy's sock drawer.

And then all they could do was wait.