Harry Potter and the Founders' Vault

Disclaimer: same as always

Facebook: Fanfiction Millma Verse

Note 1: For those reading when this was originally updated, we apologize for the delay of a week – my Beta had some issues which meant he couldn't edit it in time for the original update day. We got there in the end though for a week later.

Note 2: We've mentioned this before, and as you know we're using a lot of the Hogwarts Mystery game elements in this story, but we're changing a few things up from what was in the game. Mainly because we plotted it before the games real ending of the Hogwarts years came around. Don't worry as we have a game plan for these elements too.

A Weasley Wedding

Since Bill had been born, one of the most important things for Molly Weasley had been her children. She had imagined what life would be for all seven since their births; their Hogwarts houses, what their eventual jobs, their partners... Of course, she wasn't always right. She never thought she would end up with a curse breaker or dragon keeper as a son, but overall, she was glad at seeing how their lives were playing out.

One thing she pictured most was their eventual wives – or in Ginny's case, husband. She always wanted them to find someone they loved as much as she loved Arthur and have many children of their own. She also wanted their eventual spouse to be someone she approved of; someone who would become her daughter, or son, in everything but blood. So, Molly couldn't help but be overjoyed when Bill and Mallory 'MC' Crusher started to date and announced their engagement. MC was already like a daughter to her, even before the two had dated, having sort of taken her in during her formative years when MC had no true family to return to during the Christmas and summer breaks from Hogwarts. This wedding would just make it official.

It might be why Molly was going all out for this wedding. They might not have a lot of money, but Molly knew how to stretch a galleon. The backyard of the Burrow was decorated beautifully; Arthur, and several others, had volunteered to get a large tent set up. Molly had made sure they had enough food for a feast with many different options. This wedding was going to go off without a hitch.

"Do you need an extra wand?" A voice Molly didn't recognize right away spoke, but when Molly turned, she saw Harry and Harper with three adults standing in her kitchen. Molly remembered Tim Evans from Diagon Alley, and she of course remembered, Barnaby Lee from when Bill and Charlie were in school. The blonde next to Tim was new, but with her resemblance to Harper, Molly knew this was Tim's wife.

"Harry, Harper," Molly said with a smile, bringing the two into a hug. "Tim, so good to see you again! And you must be Harper's mother?"

"Cassidy Evans," Cassidy said with a smile.

"And Barnaby," Molly said bringing the boy into a hug. "We've been waiting for you. MC is up in Ginny's room getting ready with some of the girls and Andre is up there as well. Harper, why don't you and Barnaby go up there?"

"Sure thing, Ms. Weasley," Harper said, and nodded to Barnaby who went with her upstairs.

"Harry, the boys are on the other side of the yard using Ron's wand-making shed to get ready. You're welcome to join them," Molly said.

"Thanks," Harry said.

"But Harry, what is it you are wearing?" Molly asked; she realized the clothes Harry was wearing must have been formal wear, but they were very different from the dress robes of the United Kingdom; Cassidy and Harper were wearing pretty dresses, but Harry and Tim's outfit was unknown to her. They looked almost muggle-like.

"New suit. Dad and mom brought me and Harper shopping for formal clothes," Harry said with a smile before moving off.

"We don't do dress robes," Tim explained. "I hope these are alright?"

"Oh, they look very nice," Molly said, but didn't sound too convinced.

"Well, I am going to go help Arthur," Tim said, moving off to help get the tent up, taking out his own wand; Molly hearing her husband ask Tim if he knew the function of a rubber duck as he joined the group.

"We didn't know what gift to bring," Cassidy spoke now, moving with Molly and holding up the wrapped present. "We hope they like it."

"I am sure they will love it and can I say your two children have done so much for my own children – saving their lives, getting Ron into wand-making, getting that… Scabbers away from us. They have been very good to the Weasley family. Whenever they need us we will be here for them," Molly said.

"Thank you," Cassidy said. "And thank you for letting them stay until school starts. I trust Helia got their trunks and animals here okay?"

"It was very shocking seeing a phoenix appear until Ron and Ginny explained it was yours," Molly chuckled at that. "But yes, everything got here. Lucy and Daisy have been well taken care of since yesterday and it's no problem letting them stay. Hermione and Neville will be staying as well until school starts," Molly said, leading the way out of the house now herself.

"Great," Cassidy smiled. "Oh, and Harry packed our family tent in case you needed extra room," Cassidy said.

Before Molly could say anything about that a new voice was heard and Molly turned to see Albus Dumbledore exiting the house – possibly having arrived by the floo.

"Oh, Molly, you have out done yourself. The house looks fabulous!" Albus said, moving quickly to join her and Cassidy.

"Thank you Albus," Molly said. "I am very pleased you are attending."

"Well, I must attend to perform the ceremony," Albus said.

"So, you're who Mallory said she would get to officiate," Molly said with a smile.

"And Cassidy," Albus said, nodding to Molly's comment but his attention drawn to the other mother. "How good to see you again."

"Hello again," Cassidy said with a smile to the headmaster. "Good to see you too."

"How is Sirius?" Albus said.

"Adjusting. He's taking care of our younger son, Boyd, while we're here," Cassidy said and Albus gave a smile as he moved off.

…

Up in Ginny's room at the Borrow, MC was checking the final touches on her wedding dress for today. She was joined by Penny Haywood and her sister, an Asian girl called Tulip, Hermione, Tonks, Ginny, of course, and Andre Egwu.

"Oh, Andre," MC said moving out from behind a screen that they had placed in the room. The bed was gone, for now, and it had been transformed into a dressing room for her and her bridesmaids and some others. The only male in the room was a dark young man wearing purple dress robes. "You know, I am sorry your Quidditch career never worked out, but I'm very glad you went into fashion design. This is beautiful."

"I was only ever the reserve Seeker at school," Andre dismissed. "But this dress is one of my best," Andre said with a smile as MC looked into a mirror. "I definitely want to take pictures to advertise on."

"Of course, Andre," MC said with a grin.

"Although can I say you're the only former Quidditch player I know who would have their wedding during the World Cup," Andre pointed out.

"Yes…" multiple people in the room agreed with the sentiment.

"We forgot but I am very thankful you all choose to come to my wedding instead," MC said, giving a small laugh.

"Hi MC!" MC had to smile as she heard the voice and Barnaby came in, followed by Harper. The crup and cat, which Ginny and Hermione had with them, jumped up at Harper, who picked up the cat and gave the crup a good pet.

"Barnaby," MC said, coming and giving the man a hug. "Thank you for agreeing to give me away."

"Of course, but who am I giving you to?" Barnaby asked.

"I am tired of explaining this to him," Harper pointed out. Barnaby was a little simple sometimes, but in a cute way.

MC gave a giggle. "Barnaby, all I am asking you to do is walk me down the aisle to Bill," MC said, and Barnaby gave a nod. "I don't think we have met?" She turned to Harper.

"Harper Evans," Harper said with a nod, still holding her cat Daisy. "And I've heard a lot about you."

"She's Harry Potter's sister," Penny said. "And Cedric's girlfriend."

"Hi, Ms. Heywood," Harper said, knowing Penny as the substitute Hogwarts potioneer who lived in Diagon Alley with her girlfriend, Chiara.

"Penny please, and I believe you know my little sister Beatrice?" Penny said, indicating the other girl in the room, and Harper smiled at the older student; she knew Beatrice was a Hufflepuff and going into her 7th year. She had helped them get more people to help with the Buckbeak protest at the end of year three.

"Hi," Beatrice stated. "Cedric's told us a lot about you."

"I'm not surprised," Harper giggled at that.

"Let me introduce everyone. You seem to know Barnaby and my Maid of Honor, Penny, and of course Beatrice," MC said. "This is Tulip Karasu and, of course, Tonks, old school friends…"

"We know each other," Tonks said with a smile to Harper.

"And I know you know Ginny and Hermione," MC said and Harper gave a nod at that. "I hear you're almost rivaling me in stories to tell about your time in Hogwarts."

"Well, every year has been interesting," Harper said.

"It always is," MC said back.

"Girls!" It was Molly Weasley's voice as she came into the room. "…and Andre, Barnaby," she paused at the two boys in the room, but knew they were here. "We have a half hour to go until the ceremony."

"Thank you, Ms. Weasley," MC said.

"MC, you are family now. I told you, it's either Molly or mum," Molly said. "But there is one other thing I want you to wear..." Molly backed out of the room for a moment and came back in with a beautiful tiara – it had moonstones and diamonds in and glittered and twinkled in the light. "My Aunt Muriel's tiara. She agreed to let you wear it for the wedding."

"It's beautiful," MC said as she let Molly place it on her head.

"There," Molly said with a smile. "I'll let you girls do any last-minute touch ups. Harper, Hermione, Beatrice, be down to get your seats before the ceremony starts." The three being the only three in the room not in the ceremony party, after all.

"Make up!" Andre said, taking out his wand. "Let's put the finishing touches on everyone."

…

Harry had easily been able to find the shed where Ron made his wands, with Ron and Neville outside and other familiar Weasleys.

"Harry!" Neville was the first to see him and greet Harry with a hug. "Thanks for the birthday present."

"Thanks as well," Harry said, he and Neville only one day apart on birthdays, after all.

"Harry, look," it was Ron holding out a wand. "Helia's feather as a wand core. I showed her when she delivered your trunks, Lucy, and Daisy. She seemed pleased. Unfortunately, it didn't choose me, but it feels really good – better than others. I wonder if I can…?"

"Ron, you'll have weeks to show Harry all your wands," it was an older Weasley whom Harry didn't recognize. "I'm Bill. This is Charlie."

"Nice to meet you," Harry said, holding out a hand, which Bill took. "You work with dragons, right, Charlie?"

"Yes, are you interested?" Charlie asked, a glint in his eyes.

"I love dragons. Newt Scamander is basically like an extra grandpa to me as my mom runs one of his reserves. We have one or two there, but Newt keeps most of his dragons in other reserves. He also focused on more than just dragons – he promised to one day bring me to the Dragon Reserves you work at," Harry said.

"Tell him to ask for me. I'll bring you around," Charlie said. "We have…"

"Okay, like I said about wand talk, dragon talk can be later," Bill said. "Ron, finish putting on your dress robes."

"Alright, and thank you for buying me nice ones," Ron said, moving into the shed.

"Had to, the ones mom would have gotten him would have been horrible," Bill said at that; Ron had been the only one of the Weasleys without a good set of dress robes and Bill had seen the ones Molly had been picking out from the second-hand robe shop. Bill had been buying himself new ones anyway and offered to get Ron a better set himself. Molly had argued, of course, but Bill pointed out both he and MC made decent money as curse breakers - more than enough to get an extra pair of dress robes.

"Crookshanks, get off!" It was Ron's voice from inside the shed, having gone back in to put Helia's wand away.

"Crookshanks?" Harry asked.

"His new cat," it was Fred who said it, coming up from the main marquee.

"I thought he got an owl after everything with Scabbers," Harry said remembering Ron mentioning that when he started talking to Harper again.

"He did but Ginny got attached to that owl so he was going to buy a new one," George added.

"With the money he made at his job with Olivander," Fred completed.

"But ended up with a cat," the two said together.

"Is Harper here?" Fred asked. "We need to plan with her."

"She went to go see the girls," Harry said.

"And no pranks at my wedding!" Bill groaned. "I will have Percy watch you two if necessary…" it was then Harry realized Percy wasn't with the group of boys and Harry wondered where the former Gryffindor Head Boy was. With that threat, though, Fred and George were making promises of being good.

"We did hear about the prank war your sister had with them and remind me to give her a hug," Charlie said to Harry, who had to chuckle at that.

"Boys…" it was Arthur coming up now. "30-minute warning. Get ready…." At that, an orange cat ran out of the shed and passed them at top speed – Harry assumed this was Crookshanks. "And let me get the cat inside!" Arthur ran after the cat, calling him by name as Ron came out, now fully dressed in flowing robes of purple. He looked quite smart in them.

"You boys better find your seat," Charlie said. "Harry, we'll talk more later." Charlie gave him a wink.

"You guys aren't in the wedding party?" Harry asked after Fred and George.

"No, MC only has four girls on her side: Penny, Tonks, Tulip, and Ginny. Bill decided to have Charlie, Percy, Ron, and Diego. He said he didn't want to include one of us and not both of us. I think he's just worried we would do something up there," Fred said, a smirk on his face at this.

"Of course, MC could have found more girls to join," George pointed out. "But we're not upset. Who wants to be in a wedding party anyway?"

"Hey!" It was Harper and Hermione coming up to them. "Arthur told me to leave Lucy and Daisy inside…"

"Too bad," Harry said, looking around; there were a lot of people around now, who he assumed were Bill and MC's school mates – and he recognized several Hogwarts professors and one or two he didn't recognize. "Hey Fred, George, why is Barnaby walking MC down the aisle? Does she have no family to walk her?"

"Oh no, she doesn't," Fred said.

"So, she's orphaned?" Harry said with a sad nod, figuring it happened in the war.

"Not exactly," George said confusing the four. "In her 7th year she was the key to helping take down a dark wizarding group run by her father, called 'R'. Her father died in it's down-taking, but not before saying some nasty things to MC. Besides, she also responsible for sending her older brother and several other dark wizards and witches to Azkaban."

"She was rewarded with the order of Merlin 3rd class for her part in the down taking of R and closing all the Cursed Vaults in Hogwarts forever, but it did come with a price. Her mother marched into Hogwarts her last day and told her to never come home. As far as she was concerned, MC was dead to her because of what she did to her son," Fred completed.

"Seems Jacob Crusher was the preferred favorite of her mom," George contributed.

"Not that we know why. He was a bit of a self-absorbed idiot, from what we knew of him," Fred added.

"From our understanding, the Aurors department tried hard to recruit MC," George said.

"Even the Unspeakables wanted her, but MC went off to be a Curse Breaker with Bill," Fred added. "And the rest is history…"

"What's an Order of Merlin?" Harper asked after a moment of taking in the story.

"One of the highest honors anyone can be rewarded here," Hermione said. "I think it's kind of like your presidential freedom medal."

"Oh yeah, Dumbledore's chocolate frog card said he got a First Class one," Harry said as he remembered that.

"Go MC," Harper nodded at that, impressed.

"Come on. Let's get in our seats," Neville said now, and the group agreed, going to find their seats in the second row, right behind Fred and George who were in the first row. Tim and Cassidy joined them as other guests took their seats. An older woman was sitting near them who Fred and George mumbled to them was their great Aunt Muriel. She was holding an old-fashioned ear trumpet and seemed to have a permanent scowl on her face.

The Fab Four had to give a smile as Dumbledore took his place in the front, where he would conduct the ceremony. Bill walked down the aisle first with both his parents escorting him; Molly and Arthur were overflowing with happiness as they reached the front and both hugged Bill before taking their seats, with Bill standing to the right of Dumbledore.

Then the wedding party made their way down the aisle. Charlie had Penny Heywood on his arm, while Percy was escorting Tonks down the aisle. The auror they knew as Diego Sans was with the woman MC had introduced as Tulip, while Ron and Ginny walked down last with each other.

Then, golden balloons appeared almost out of nowhere.

"Wow," Hermione mumbled at the shining display as Barnaby came down the aisle with Mallory Crusher in her full flowing white dress. She seemed to be glowing as bright as the balloons around them.

"Look at my tiara! It pulls the whole outfit together," Muriel said, loudly. "Isn't it stunning?"

Harry chose to ignore the older woman as he paid attention to the ceremony; Bill taking MC's hand and shaking Barnaby hand as MC gave him a kiss on the cheek then the two took their places in front of Albus Dumbledore.

"We are gathered here today to watch as we join these two souls into one," Albus Dumbledore began.

"Beautiful girl but my tiara really…" Aunt Muriel was still saying.

"And may I remind everyone we are silent observers," Albus said, and his twinkling eyes were on Muriel, and it seemed being called out by one of the most powerful, if not the most powerful, wizard in the world made her quieten up about her tiara. "I have lived a long time and watched many students find the person who completes them. From watching these two during their school years I can tell they do complete each other. They have grown together. They are partners in life, in work and in family. Today they step out of their youth, away from their birth families and join together as a new family."

Albus paused for a moment as there was a sniff from the front row – Molly had a handkerchief to her eyes.

"William Arthur Weasley do you take Mallory Crusher to be your wife?" Albus asked.

"Yes," Bill said.

"And Mallory Crusher, do you take William Arthur Weasley to be your husband?" Albus asked.

"Yes," Mallory answered.

"The two have made their commitment to each other," Albus said. "Please, take each other's hands…" Bill and Mallory held hands and Albus waved his wand and a thin rope appeared around their hands and going up their arms. "Let the rope representation their new commitment to each other and their two souls now joined as one. By my power, granted to me by the Wizengamot and the Ministry of Magic itself, I proclaim you husband and wife. You may now kiss."

Bill and Mallory kissed and everyone stood up to clap. As they kissed and everyone clapped Albus waved his wand and the chair disappeared in a puff of smoke – the tent changed into a dance floor. Bill and Mallory pulling apart and smiling as music started and they started their first dance with their bridal party joining in.

…

The party for the wedding went late into the night and the food was completely delicious. Harry and Harper danced afterwards.

"Mione," Harry said after they went back to the table they were sitting at. "Dance?"

"Well thank you," Hermione said, taking Harry's hand and getting up to join him in a dance, passing Aunt Muriel on the next table.

"No, thank you, I'm a hundred and four, you know!" Aunt Muriel called from the next table, batting away one of the wedding guests – another Weasley given the red hair – who seemed to have been offering her a plate of food.

Harper turned to smirk at Neville, amused by Aunt Muriel's antics.

"Harp, Hermione is still dating Dean and last I heard Harry was still with Enola," Neville spoke up. "You're losing the bet."

"That's not going to last for long," Harper said, patting Neville on the back. "What are you looking at?"

"The guy in the wheelchair," Neville said.

"Yeah, that's weird but not impossible in the magical world," Harper said. "I think he's called Murphy McNully. Another friend of MC and Bill's… what about him?"

"Oh, he's cute," Neville said without thinking, making Harper pause to look at him. "What?"

"I didn't… well… I kind of thought you had a thing for Susan?" Harper stated.

"No, she's like my sister," Neville said. "I just… um…" Neville went red at this, although his eyes were still on Murphey.

"Your secret is safe with me," Harper said and kissed his cheek. "Want to dance?" Neville smiled and went with Harper on the dance floor. Harper wished Cedric was here, but she knew he was probably having the time of his life at the Quidditch World Cup.

…

It was late at night when Tim and Cassidy wished their kids goodbye. All the guests had left, leaving the Weasley kids, Harper, Harry, Neville, Hermione, MC, and several of their friends. Aunt Muriel had made a lot of drama about leaving but had done so in the end.

"So, do we call you MW now?" Penny joked with MC; a girl with silver hair was next to Penny, having been sitting in the back row at the wedding but had come out of her shell a little during the party. Harry recognized her as Chiara, and she and Penny seemed to be a couple.

"You can still call me MC," Mallory said back leaning into Bill. "But you four. I've got to hear about your first three years."

"Not much to tell," Harry said and Ron, Ginny, Fred, and George actually laughed.

"Come on, you killed a basilisk! Tell us about that?" Mallory said.

"Um…. Well, not much to tell. Sword, head, dead," Harry mumbled. He now had Lucy with him and petting her. Harper was hugging Daisy.

"How about you tell us about the Cursed Vaults?" Harper said, to redirect the question.

"Um… not much to tell," Mallory stated, and now her friends laughed. "Okay, I get it." Mallory gave them a wink.

"Everyone! To bed!" Molly had come out of the house. "Bill, Mallory, you have to leave early tomorrow, too," Mallory and Bill's friend said goodbye to them before leaving.

"Oh, we should set up the tent for us four," Harry said.

"There's no need. Hermione and Harper can stay in Ginny's room and you two with Ron," Molly said.

"Be far more comfortable in the tent," Harper said.

"Molly," Arthur said. "If they want to pitch a tent in our back garden, let them," Arthur gave the two a wink as Harry went inside to grab the tent.

"Why is a tent more comfortable?" Hermione asked as Harry came out with it, having it in his trunk in the house, and Harper went with him to set it up.

"Definitely more comfortable for all of us," Ron joked as the Weasley siblings said their goodbyes and went inside the house.

It didn't take Harper and Harry long to get the tent ready like pros, and then Daisy and Lucy went in. Harper and Harry brought theirs, Hermione, and Neville trunks in before going in themselves. Neville was behind them and Hermione shrugged and went in too. She paused looking at the inside.

The tent was like an apartment – inside there was a living area, a kitchen, and bedrooms, although there were no doors, just canvas separating the rooms. Hermione had to pause at this.

"I love magic," Hermione giggled at this.

"There are three bedrooms, a kitchen, and dining room, too," Harper said sitting on the arm of an armchair that was in the living room.

"Kind of like the Doctor's TARDIS, from Doctor Who, right?" Harry said with a wink, remembering last summer and Hermione's father showing them the science fiction how.

"Yes," Hermione said, going to sit next to Harper.

"There was another reason we wanted the four of us together," Harry said. "We… well, we have kept something from you two we wanted to tell you." They had been debating telling their friends this since they'd got the wedding invites last month.

Harper gave Harry a nod and Harry went to take out Harper's dagger from his trunk.

"My dagger, I have been wearing it all of last year on my ankle," Harper said. "Hermione knew this. Neville, sorry we didn't tell you. There is something you should know about the dagger, too... I got it in the Chamber of Secrets – and it belonged to Rowena Ravenclaw."

"That makes no sense. Why would it be in the Chamber of Secrets?" Hermione asked.

"Because Rowena gave it to Salazar Slytherin when she married him," Harry said, making both look at him like he had grown a second head. "I have proof. The blood magic last year. Flamel taught us it so we can trace our family tree back a thousand years."

Harry took the family tree he and Harper had worked on last year from out of his trunk and unrolled it, letting Hermione and Neville look it over. "The Founders are linked in more than just education," Harry explained.

"Wow, Godric and Helga too?" Neville said. "Well, at least for Harry."

"Adria Slytherin-Ravenclaw," Hermione mumbled. "Have you found anything about her?"

"Nothing," Harper said.

"I will look through the Hogwarts library; see if there are any books about Founders' children," Hermione said.

"We think the answers we need are in the Founders' Vault, though," Harry said, loosening his tie and taking the Vault key he was wearing out. Neville and Hermione also showed their keys. "One more to go."

"This year, we do whatever we have to do," Harper said.

"Agreed," the three said together.

"Thank you for sharing this with us," Hermione said, giving them both a hug and Neville did too.

"Okay, girls can take a room for themselves. Neville and I will share," Harry said, leading Neville to a different room.

Harper pointed out the room to Hermione and took the last one. She then took out her communication notebook after she had changed into her pajamas and messaged Harry.

Think we should have told them Sasha is alive? She wrote to her brother.

It took a moment before Harry to reply. Hell no, Harry wrote back. The two don't need to know about her yet.

Harper nodded and took a breath. Is there something we forgot to tell them? Harper asked Harry who responded with I don't think so. Harper shrugged and put the book away before snuggling with Daisy in the bed.

Post Chapter Note: And there you have it. Our Weasley Wedding is done. Sigma loved Aunt Muriel in the book's wedding for Deathly Hallows, so tried to include a few elements of her character in this. Also, as mentioned above, there's some changes to what the mobile game Hogwarts Mystery gave us, but we have our own plan for MC, the Cursed Vaults, and MC's lineage that may surprise you all. Oh, and a nice little moment for Neville above (nothing to do with the mobile game, obviously).

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