Marauders' Pack.
When Harry woke up, he followed his usual routine. He was a little hungry but that could wait. It could always wait. First, he let his magic scan his body, a habit he had always kept from his time with the Dursley, he needed to know if he would be able to function that day on the level either Vernon or Hogwarts multiple steps would require, and later on after the war, he was mostly checking to see if something might have happened while he slept. Thanks to Draco who was able to create a none addictive version of the dreamless sleep potion, Harry had woken up to weird and dangerous situations in the past couple of years. His body was fine, actually his magic was telling him that he had never been in better health, the only odd thing was that it was the quickest scan he had ever done, his body was smaller than usual, and not in the joking fashion ‘the twins might have prank him’ way, he was really tiny.
Second, Harry let his magic scan the room he was in, to try to find out if anything or anyone dangerous was happening. He was reassured though when he felt Luna’s particular strain of magic close to him. He didn’t know how she was doing it, but you could always tell if Luna was happy because if left a distinctive taste on him as if he had been dipping in a pool of hot dark chocolate. She used it at times to calm him or lull him to sleep. Luna felt smaller too, her magic was not as potent as it was usually. Scanning past her, he felt something that made him open his eyes immediately.
The two different strains of power he had felt were familiar to him. But not so familiar that he could recognize it instantly. But it felt protective and loving. He knew who those people were, he had felt them before, but he couldn’t remember who they were.
Opening his eyes didn’t help. The ceiling in the room was painted light green. Seeing the color, brought memories of the previous night to him. His family’s sacrifice, his parents’ death, Strange bringing him to NY, to Clint and Tasha, and…
The magic around Luna and Harry, he finally knew why it was so familiar, yet so strange. Sirius and Remus, they were there, alive. And he was so small because he was a baby again, a toddler, Luna was a baby.
Harry finally, turned his head to the side to look at Sirius who was looking at him too.
“Pa’foo’.” Harry cooed happily. Turning so he could snuggle against him. But before Sirius could answer Harry whined.
“What’s wrong Pup?” Sirius asked.
“Pee-pee,” Harry told him, not really agreeing with his mind who seemed to force him to use a toddler language instead of using the adult vocabulary he remembered.
“I would say that’s what your diaper his for, but…” Sirius started to say but stopped chuckling softly.
Harry knew his glare wouldn’t work all that well, but as long as Sirius didn’t force him to pee in his diaper, he could laugh all he wanted. He never managed to master the death glare anyway, people always ended up cooing at him.
“Okay, arms up. I’ll take you to the loo.” Sirius told him lifting him up to his chest once Harry dutifully offered his arms up to him. “So, I guess you still remember being an adult?” Sirius asked once he was done trying to hold his one-year-old godson seating over the toilets, so he wouldn’t fall.
Harry simply nodded.
“I hope Severus will be able to help you with that,” Sirius told him once he had tucked Harry back into a fresh diaper, thankful that Remus had the forethought of taking a few of those out of the bag to leave in the bathroom after their bath the previous night.
“Sirius!” Speak of the Wolf. “I need you to open the bag, so we can see what we’ll need to get,” Remus said as he brought a whimpering Luna into the bathroom. “I hope we can spell the diapers to fit Luna too because I could only find one size.” Said pausing to try his wand on a diaper before he even tried to undress the little blond. “Thank Merlin, that actually works. I know Harry had a bath last night, and you just changed him, but we should bath Luna.” Remus added and watched behind himself as the water turned on in the bathtub. “Are there House Elves, here? We could ask them for things in Luna’s size.”
“I don’t think those are House Elves, we are in a muggle home. There is electricity running around everywhere. But that JARVIS guy, they said was aware of everything, he seems to be just as efficient.” Sirius explained to him, getting a chuckle from Harry, who remembered both FRIDAY, Tony’s and the Avengers’ explanation of JARVIS, and Vision strange fixation with human boundaries.
“Oh, you know JARVIS don’t you, little Pup?” He said tickling Harry’s tummy.
Harry nodded giving him a toothy smile.
“Do you know where we are?” Remus asked not expecting Harry to give him an actual answer, although Harry did try to tell them, it seemed like he couldn’t form the words. “Do you trust them?” Harry nodded really hard at that.
“That’s fine by me,” Sirius affirmed and took Harry back to the bedroom to retrieve the spelled bag, bringing it to the bathroom to check over with Remus without having to yell or distract Remus too much from his task of bathing Luna.
“Wow. Someone did serious work on this. It feels as if there is nothing in but there are enough things in it to fill my parents’ house.” Sirius said sitting on the floor and putting Harry down on the bath rug, so he could crawl around without getting cold from the marble floor. “Do not get out of the rug,” Sirius told him. Getting another attempt at the baby death glare for his pain.
“The baby stuff first we’ll check on the rest later. One of the men from last night said there is a notebook we need to read together, and I wouldn’t trust someone who did all that work on a small bag to not have put some curses on dangerous things in there.” Remus told him.
Harry nodded along with Remus’ theory. “Bi’’ do.” He told them.
Sirius kept looking into the bag, whoever put the bag together knew what a baby would need. Though it looked like Luna’s stay with them hadn’t been planned, all the clothing, all the toys were meant for one-year-old and up, while there was only one crib, one carrier, which Sirius enlarged immediately and put down next to the changing table for Remus to take Luna around, Harry liked to walk and if he got tired or wanted to be held Sirius would do it, he knew the wolf would want to have his daughter close to him.
Once he was done perusing the bag, he looked up only to see Harry focusing on Luna who was screaming at Remus. Luna started to hover above the water giggling.
“Grab her,” Sirius mumbled to a stunned Remus and turned his attention toward Harry. “Pup,” He said trying to keep calm as to not startle him. “Look at me.” Harry looked back to Sirius unsure of what he did wrong. “Oh, Pup, you did nothing wrong per Se, but your sister isn’t a toy, I know that it is fun to levitate your toys and that you remember being taught the spell to do it.” He explained taking Harry into his arms to comfort him. “Do you remember what Flitwick taught you in first year?” Harry frown clearly trying to remember. “You have to start slow to build up the strength of your core and the stability of your charms,” Sirius told him. “You were a grown up, and I am sure you levitated thing bigger than Luna but your core was bigger and more stable. You are just a little boy and even though we told you plenty of time you are very powerful you don’t have the same control on your magic.”
Sirius stopped when Harry started crying, he knew that Harry had no other way to express how sorry he was for what he did. He had probably realized what would have happened if his magic had stopped working suddenly while Luna was up in the air, worse, above water.
“I won’t say that it’s okay because it is not,” Sirius told Harry when he started to calm down. “We know it’s going to take time for you to adjust, can you try to remember that you don’t have to be a grown-up, you are our little boy, and we are here to take care of you, we won’t leave you alone, and we will also protect your little sister.” Sirius pleaded with Harry.
“Sis’e’?” Harry asked looking around curiously.
“Well that should answer one of the questions, either he didn’t remember, or they were never told,” Remus said taking Luna to the changing table to dry and dress her.
“Yes little man,” Sirius said tickling him. “Luna is your sister.”
Harry frowned and Sirius watched as he clearly tried to recall any memories of this information before he looked up at his godfather with a questioning look in his bright green eyes.
“Do you recall when we explained, why you had a mommy and three daddies?” Sirius asked him, Harry shook his head. “Prongs, Padfoot, and Moony loved each other very much, and decided to be a pack, and that Moony would be our Alpha…” Sirius started a story that was usually Harry's bedtime favorite. “Prongs met your mommy, and she was fiery and caring, she would tell him off when he was being an idiot, and he just loved her, even more than he loved us. It was different, Lily wasn’t part of the pack yet, and she wasn’t sure she wanted to be, because she didn’t really like me, and she was a little scared of Moony.” Sirius told him and chanced a look at Remus to make sure he was okay, as he did each time when this part of the story came, but the wolf just rolled his eyes at him with a smile. “Eventually, we explained, that although we love each other very much, we are not in love with each other, we never kissed, we cuddle a lot though,” He said cuddling Harry closer and blowing a raspberry on his cheek. “Pack is family, just a really close one, and any little gift Dame Frigga would grant us would belong to the pack.”
“P’ongs’e’ gif’.” Harry said nodding, and pointing at himself, as he always did, showing to Sirius that he started to remember that part of the story.
“Yes, you, my little Prongslet, were our very first gift,” Sirius said kissing the top of his head. “Do you remember why you were a gift?”
Harry nodded grinning, “P’ongs’e’ be webbing gif’, woo moo ‘ove.”
“Yep, Mommy and Prongs loved each other so much, there was too much love for just the two of them, so they invited us all to celebrate with them at their wedding, and Dame Frigga was so happy to see them love each other so much that she gave them a wedding gift that would help them stock all their extra love, and it was you,” Sirius told him, with a soft, sad smile.
He loved this story, but he knew that James and Lily wouldn’t be able to share their love with Harry anymore, at least not physically. Sirius had no doubt that they would continue protecting him from where they were, it was part of the reason why he would save Severus, he would have done it just because Harry asked, but Lily’s eternal wrath helped convince him.
“Well, Moony did something really good, and he protected someone who is a friend. He sacrificed something really important to him, so he would be able to save this person and Dame Frigga wanted to reward his good behavior.” Sirius went back to his explanation. “So when Moony saved that person’s life, she decided we deserved to have another gift because that’s what good people get like you get ice cream when you help clean your room,” Sirius said, but he could feel Harry’s dubious look even without looking down at him. “But don’t worry, Dame Frigga knows that no matter how good you are, you are too little for this kind of gift, ice cream is better for little boys.” He said quickly when he realized where it was going with that kind of reward system, he wouldn’t ever be able to tell Harry he was being a good boy without him expecting to have a baby handed over.
He looked up sharply and glared at Remus when the wolf started laughing so freely it made Luna giggle too.
“‘una Moon’et?” Harry asked still looking doubtful.
“Yes, little Cub,” Moony said sitting in front of them on the bathroom rug and putting Luna at easy reaching distance for Harry. “Is that okay?”
Harry seemed to think it over, though Sirius wondered if it was baby Harry that was wondering about it, or his grown-up counterpart wondering why they hadn’t known about it.
“Wow no say?” Harry asked glaring at Remus. And Sirius wished both that Harry would forget about his past, and that they had a better way to communicate with him, there were clearly things, which would happen in the future, that were terrible.
“I really don’t know Cub. I hope we will find out soon so that I can fix it.” Remus told him and leaned in to kiss his forehead.
“‘kay,” Harry said nodding and holding his arms out for Luna to reach.
“Are you happy to have a little sister then?” Remus asked him, clearly anxious.
“‘una happy, P’ongs’e’ happy.” Harry nodded before adding “P’ongs’e’ ‘ove ‘una.”
“Oh, you and she married in the future?” Sirius asked wondering how they could make sure that would still happen while raising them together.
But Harry’s irritated face made him rethink that. “‘una pack.” He said with conviction.
“I am glad you found your own pack my little Pup, just hoping you found someone to share extra special love too.” Sirius said and his heart broke a little, as well as Remus’ when Harry shook his head in the negative. “We’ll fix it.” He said with all the conviction he could muster.
“For now let’s go find food and the others,” Remus told them raising from the floor, and handing Luna to Sirius while he put on the carrier before slipping her into it. Sirius grabbed Harry upside down and started to walk that way, happy at the little giggles the little boy was making.