Disclaimer: I do not own Harry Potter or Katekyo Hitman Reborn
A/N: Timeline is going to be skewed, but this is an AU, so there isn't much to complain about. Onto the story!
Nova slipped into Tsuna's bedroom and carefully woke him up. He rubbed at his eyes and opened his mouth before shutting it at the look she gave him. Without much thought, Nova transported them to her favorite. Fon had been the one to show it to her when she'd managed to convince her mentor, her other guardians, Kyoya, and Nana to take a trip to China. Not only was the place heavily imbued with ancient magic, it was one of the few places in the world where one could be at absolute peace. Tsuna looked around for a few moments before asking, "Why did you bring me here?"
"We need to talk," Nova dropped onto the soft grass as the nearby river glowed faintly in the light of the full-moon, "A lot will be going on and you have to keep your head while it is. Other wise..."
Tsuna dropped down beside her with a low groan, "We'll all die."
Nova merely smiled sadly at Tsuna. For once, she felt horribly guilty for pushing Tsuna so much and made a note to ensure he would have some form of peace in the future. Laying back, Nova glanced towards the sky, "Tsuna, I know that you hate my abilities for what they do to me, but you have to know that the future Lambo saw isn't set in stone. Nothing is set in stone save for a few specific points in your life. One of them was my parents death."
"I was always going to become a Mafia boss, wasn't I?" He asked as his eyes went to the sky as well.
"Yes. You were always going to have your guardians as well," Nova offered earning a soft laugh, "My interference is only changing a few things with Kyoya taking your puppy's place,"
Tsuna hummed softly, "I just...I don't want to lose you, Nova."
Nova reached out and tugged Tsuna to lay down beside her with his head on her stomach, "Death is a big part of life and my death will come. Only when certain conditions are met will it be stalled. Even I cannot deny death, Tsuna."
"It hurts to think that one day you'll be gone," Tsuna whispered softly, "You've been with me for so long. You're my big sister and helped me become better than a dame...I..."
"Hush," Nova ran her fingers through his hair as he rolled over to wrap his arms around her, "My death will be far away so long as we do our best. I promise that I do not intend to die until I cannot fight it any longer,"
"I'll get stronger," He murmured softly while burrowing his face into her chest like he used to back when they were younger, "I'll make sure your death is a far off thing. I promise that I won't let you die until you're ready, Nova,"
"I'll hold you to that, Tsunayoshi," Nova murmured softly as her arms slid down to wrap around Tsuna, "I'll hold you to that,"
If Reborn notice that Tsuna had increased his training, the Sun Arcobaleno said nothing though Nova found a package of her favorite hot chocolate brands sitting on the counter a week after she'd talked with Tsuna. Though she said nothing about it, Nova added some headache relief potion and a splash of whiskey to Reborn's espresso whenever she noticed he'd had a bad day. If she expanded her training offer to the other Guardian's, Reborn said nothing though Nova noticed that he seemed relieved. It hadn't been hard to get Takeshi to learn from his father and awakening his Rain flames. All it took was a bit of persuasion and a few Flame laced lunches that she ensured Tsuna shared with the baseball player. With Takeshi's father being a Rain, it was easy to train the young Rain guardian with his flames. The hard part came with getting the somewhat oblivious boy to realize that it wasn't a game.
With Lambo, Nova simply applied what her mentor had done. Seeing as the child was like Gokudera being that his Flames were unlocked though not Useful, Nova played games with the child to give him an understanding of the power within his body. If she gave him a few pieces of laced grape candies, no one would complain as it helped purify his flames and help his body get used to them. If she had her mentor set things up so that Lambo was officially part of Nova's family, no one complained as it meant the boy had family and could be enrolled into school. It also helped that Nova quickly set up the child's magical education while slightly surprised and angry that the Italian ministry had allowed the boy to slip through the cracks. While not powerful, Lambo still had a good amount of magic and would likely become more powerful once his energies began working together.
With Kyoya, Nova only had to give him a few tips and spar with him more often. Kyoya often spent time meditating in her backyard under the sakura trees with his tonfa in hand. If she gave him a few tips on how to better channel his flames into those tonfa and gifted him a set of Flame conductive ones, Kyoya said nothing with smirking smugly. If Nova happened to drop a few books on certain branches of magic that someone with a weak magical ability could use, the Cloud said nothing while increasing his patrols around her house.
Nova did nothing when it came to Tsuna's would be Sun guardian. Not only did she have no patience for the loud mouth, Nova simply could bring herself to be around him. The pull to bond with a Sun was strong what with Reborn being nearby and Nova knew that everything rode of Ryohei being Tsuna's Sun guardian. Along side that, Nova simply didn't have the ability to train the teen. It would only lead to Nova having multiple attacks and speed up her death. It didn't help that Nova would never be able to stand his shouting. With her animagus form being what it was, Nova's hearing was sensitive enough that the teen could make her deaf if he shouted unexpectedly.
With a warm smile, Nova began teaching Fuuta about controlling his abilities much to Tsuna's relief. She knew that the 'ranking prince' had gained a lesser bond with Tsuna though it wouldn't be discovered for a long time. She would say nothing as the advantages of the bond being unknown were too high. After all, a Sky had the ability to track down their guardians if said elements went missing. The same could be said for individual elements and their bonded Sky. It wasn't a very well known ability due to how rare it was for both the Sky and their elements to have a deep enough bond. An unknown fact about it would be that if a Flame user had a Flame active child, they would always know where that child is if they concentrated hard enough. Of course, Nova would be keeping said facts to herself until they were needed.
Nova watched as Tsuna confronted one half of his would be Mist guardian. To see how the Mist acted now to how he would act in the future was grating, the Mist really needed a good kick in the pants and maybe a thorough pranking to get him onto the right path. However, Nova found herself looking forward to how Belphegor would react to the Mist and his fixation with Tsuna. Ah, the future would be so much fun!
When the Vindice appeared, Nova stepped in with a sigh, "Please desist."
The Vindice officers turned towards her, "And why would we do that, Seer?"
A gasp sounded from the bound Mist and his alert companions. Nova ignored them as she moved to stand beside Tsuna and felt Reborn jump onto her shoulder, "I wish to take the Mist and his companions under my custody," Nova let her Flames seep out and surround the Vindice making the officers gasp softly, "They will be instrumental to ensure the correct future will occur. If you and yours truly desire revenge against the one who did this to you, you must allow me to take them into custody. If not, your revenge may not occur while with them, it has the best chance to happen," Nova almost rolled her eyes upon seeing that they would do nothing, "Please get me Bermuda. Tell him that Lotus' great granddaughter requires his presence."
The Vindice shifted before the leader nodded to another that disappeared immediatly. He turned to her, "You realize that if you speak falsely, you will be taken along with them?"
"Auntie taught me everything about our world," Nova replied as Reborn stared at her with horror hidden inside his eyes, "Not to mention, I am fully aware that you all can sense just who I am to become. Those linked with death always sense one another, ne?"
Nova smiled serenely at them just as the Vindice officer from before appeared with Bermuda on his shoulder. The former Arcobaleno and current leader of the Vindice stared at her for a moment before breathing out, "You look almost like her."
"Great Grandfather," Nova greeted the man earning multiple gasps and stares from everyone in the room, "I apologize that our first meeting must occur like this, but your officers are making things difficult,"
"What is your name?" Bermuda asked her softly.
"Nova Noir is what my Auntie named me. My real name must remain unknown for now," Nova told him with an apologetic smile, "I only wish to ensure that the best possible future happens, but it won't if my true name is known right now,"
Bermuda was silent for a few moments before asking, "And what is it that you require?"
"Custody of the Mist and his companions," Nova informed her great grandfather, "They are instrumental in ensuring that the correct future occurs. If they're under my custody, I can assure you that your chance at revenge against the man in the iron mask will be almost guaranteed,"
Silence filled the room as Nova finished speaking. She knew that everything rode on the former Arcobaleno giving his consent. She also knew that she'd have to explain her relation to the former Arcobaleno. She would also have to give her Guardian's this knowledge as well and give them a better understanding of how her abilities came about. She could already feel the headache that it would cause building. Yes, it would be quite tiring no matter what which was why she'd been leery of bringing in Bermuda. When the former Arcobaleno finally spoke, Nova almost sighed in relief, "Release them," Within seconds almost all the Vindice were gone save for Bermuda and another, "Granddaughter, we will be speaking soon enough."
"I'm aware," Nova inclined her head lightly.
"Be well," Bermuda murmured softly before disappearing.
When the Vindice were truly gone, everyone relaxed for a few moments. Nova took that time to transport everyone to her home and have the house elf that Sirius hired for her getting things set up. Nova slumped against the couch after pulling Reborn off her shoulder and onto her chest where she held the absurdly warm Arcobaleno. Everyone was silent for a little while before Gokudera burst out, "What the hell was that?"
"Nova, how are you related to Bermuda?" Tsuna asked her with a frown.
"What I am about to tell you must not leave this room, is that understood?" Nova looked at each person in her living room seriously.
It took a little while before everyone gave their agreement and Nova flicked her wrist to activate the wards she'd set up for meetings like this. Even if they wanted to, no one inside would be able to speak of what would be said unless it was to one another. The ward was a mixture of potions, runes, magic, and Flames which could only be activated by either herself or anyone keyed into them. Of course, it wouldn't effect her or her guardians as they were keyed into the ward. Once it was set up, Nova took a deep breath to steady herself, "In order to understand things, I must give you some background about myself and my family history."
No Angst, but I couldn't stop myself from adding a cliffy. Right now, I am tired and have a headache. If you find errors, I would be glad to be told about them.