RWBY: The Unknown Sibling
(Harry is two years older than Ruby and three months older than Yang)

To the Anon who mentioned my timelines in ages. He is correct, Harry is the same age as Yang.

Last Time

Ozpin grinned "Not really. I've brought this to them numerous times. Yet they haven't done anything. Now Mister Longbottom this may cause a mild discomfort. For it is in passing that we achieve immortality. Through this, we become a paragon of virtue and glory to rise above all. Infinite in distance and unbound by death, I release your soul, and by my shoulder, protect thee."

Neville found himself floating and then nothing.

When unlocking ones aura it is always normal to experience an out of body experience. Neville found himself looking into the utter white expanse of his core and soul.

He watched as his magical core and soul began to interact and the primal instinctive knowledge of how to use aura in all situations began to enter his brain.

(Outside)

The council, Harry and Ozpin watched as Neville was surrounded in a bright blue light, it began to glow even brighter before suddenly vanishing "Well…That was interesting. I'll see you later, I'll get sleeping beauty back to his bed."

With that Harry, picked Neville up. He channelled dust into his arms converting it into wind and earth. One to levitate him and the other to hold the much heavier boy over his shoulder.

Glynda found him "Why did you miss my lesson?" She then saw Neville and that Harry was straining slightly.

"Sleeping tank here got his aura freed…I'm…taking him back to his room. I thought…I…sent a scroll message."

Glynda checked her scroll and a message popped up "Professor, I've got to miss this lesson as Neville, needs his aura opened and quite frankly doesn't trust me not to do it without any shenanigans."

Glynda snorted, She had a fondness for Qrow and Summers eldest. She too would have concerns about him activating her aura. She nodded "I will expect you and Mister Longbottom to fight in our next lesson."

Harry nodded "We shall…What about his squad?"

Glynda looked at him, flicked her riding crop and carried the Juggernaut Knight effortlessly "I believe until he has been deemed satisfactory in his studies, the Staff have said he would be attached to your squad."

Harry nodded "I can see the logic. Old friend, keep me under control etc."

Glynda nodded sharply "Quite."

The duo made their way to the dorms and made their way down to the last room where in it was a set of bunkbeds being assembled "No, Yang…"

Harry turned to the Professor "I'm sorry for this…YANG! STOP YANGING MY PARTNER!"

There was stone silence, the door opened and a distinctively dishevelled Nanuuk opened the door "Harry, Professor…" The three entered the room to find AND and RWBY trying to put some bunkbeds together.

"Seven people can't put together a set of bunkbeds?" Harry said as he picked up Neville and placed him on the table.

Goodwitch looked at him "You're leaving him on the table?"

"Yeah. Sleeps like the dead…" CFVY turned up as they heard Harry's yell from beneath them. Coco looked most disappointed, she had her scroll ready to film "Harry!" She growled.

"Coco, the baby is sleeping. One does not wake up the Neville." Harry whispered.

"Why are you whispering? Why are we whispering?" Whispered Coco.

"'Cause a disturbed sleeping Neville is a cranky Neville…It does not help that said Neville now possesses a very nice hammer." Harry replied reaching into his pocket and pulling out a marker pen.

Ruby and RWBY along with his team nodded. Goodwitch left, students to be students. Velvet pulled some hair out of her face and gave him a look. Harry shook his "Sorry Velvet, it's what we do."

"Touch me with that pen, Haz and we're gonna have a problem. I can't beat you in a straight fight aura or magically wise because you're too damn powerful and fast, however you can't break my aura not without throwing enough aura into attacks that could be classed life threatening…" Neville said sitting up on the table.

"Haz?" asked Velvet curiously.

"Yeah, Haz and I are close friends. We have to hang out when everyone else is in bed. Haz is under the very good assumption that everyone who he can be friends with is being monitored and influenced."

That caused several growls in anger "People calm down. The chances are they're going to come here. Nev and I can use magic still here, but not as much, frequently and not to our full potential due to the nature of Remnant."

"Haz, if I remember correctly you had a thing for elemental attacks."

Weiss looked at the dark haired teen "You singed my dress!"

Harry shrugged "Your point?"

Weiss snarled in indignation "You owe me!"

Harry chuckled "No…No I don't. Besides singed clothes is nowhere near as bad as nerve damage…Yeah, I have nerve damage as does Nev. Why do you think we can push ourselves harder, faster and stronger?"

Velvet wrapped her arms around him "You're okay though?"

Harry relaxed "Not sure…I'll cope. I'll make do." Harry replied picking Velvet up. Velvet adjusted her grip to just above his shoulder blades.

"Can you help us Harry?"

Harry looked at them "You can't put up a set of bunkbeds?" Harry sighed.

Harry walked over to Yang and grabbed the screwdriver "Nanuuk, Adam we do this same as last time." Soon enough the beds were put up.

Ruby pouted "Can you do ours?"

Harry sighed "Nev, the rooms done."

Neville nodded and he began setting up his armour rack, he was about to unload his mortar, grenade and anti-personnel/military/Grimm rounds when they detected a presence behind them.

Ozpin was at the door "Neville, please hand those over."

"Haz…what did you do?" That stopped Ozpin in his tracks

"What makes you believe that Mr. Branwen is behind this?" Asked Ozpin raising an eyebrow.

"Because Haz, is well Haz. He's a hazard to everyone and everything." Said Neville, a shit eating grin on his face.

Harry rolled his eyes "So says the one who managed to stone the entirety of the fourth to fifth years in Gryffindor AND made the collective first years and second years of the same house the munchies on par with my whale sized cousin who I hope is not dead but could not really give a shit about if he was." Harry responded calmly.

Ozpin looked at Neville and Harry as he quickly processed their conversation "You two were old school friends. Harry is also known as Haz for his ability to bring misfortune on himself. You possess a unique gift for herbs and accidentally stoned your entire house." Ozpin summarised.

"As to why I am taking your firearm rounds is because Harry had enough firepower in his room to comfortably take out a small town."

Neville looked at Harry and shrugged "That would not surprise me."

Harry shook his head "Nev, we have a date in the sparring room. Get your hammer."

(Arena)

Goodwitch stood there wearing pants and a blouse instead of her normal skirt "Let's get this over with. If you leave the ring you're disqualified and if your aura hits zero the same happens.

Neville wasn't wearing his armour and held his hammer like a quarter staff. Goodwitch nodded, it seemed Mr. Longbottom had a good ground in his initial foot placement for such a cumbersome weapon. It would need improvement but it was a good foundation for now.

Harry had slid into an identical fighting stance of his father with one hand on his blade, his left foot forward with his right foot supporting. Glynda immediately knew that if anything this match would probably end up with a draw. (6:39 RWBY Volume 3, Chapter 3: It's Brawl in the Family for Harry's stance).

Mr. Longbottom, possessed a much thicker build allowing him to take strikes that would possibly wound or even fatally kill another person. He also possessed a phenomenal strength which meant if he hit Mr. Branwen the chances were Branwen would be incapacitated almost immediately. However, Mr. Branwen possessed very fast reflexes which he further augmented with his, in her opinion, a fantastic understanding of how his body, aura and subsequently semblance interacted. She further noticed, it was subtle but it was present, Mr. Branwen did not wish to truly hurt his friend. She understood why. She had volunteered her services as counsellor for the troubled teen and that gave her a unique insight into both competitors.

She cleared the area as the two boys began their fight. Harry grinned as did Neville and they began. Harry immediately gave ground as Neville moved forwards throwing the handle of the hammer towards the thin teen.

Harry instinctively stepped to the side, only for Neville to display unnerving speed to grab the hammer, pull upwards, grab it near the head and swing the hammer close to his body and realease it with the ridged top of the hammer towards Harry's face.

Harry only managed to get his sword up in time to deflect the strike with a bone jarring clang and ricochet. Arm numb, Harry rapidly fell backwards giving more ground, dodging the flat concussive head of the hammer as it sailed past where his chest had been. He did not want to be Rhaegar Targaryen thank you very much!

Yes those books, Harry had brought with him and they had made quite an impact on all readers. To the point where the Vale Council had tried to stop it from being put on the shelves and give Harry jail time for 'disturbing the dreams of minors'.

Harry shook his head and went to slice Neville's leg only for the hammer wielder to dodge the attack. "DIE DRAGON SPAWN!" Thundered Neville, as Harry rolled away from the attack on to his feet. "Yep. Neville is far too addicted to those books." Harry thought.

Harry got to his feet and brought his blade around "Time to fight." Harry put both hands on his blade and he began his attacks. Neville took three minor scratches one to each of his arms and one to his legs.

Harry spun around using his aura to increase his speed. He lumped and went for a overhead slice that would split a Grimm in half only to move backwards as the sailed where he had been. Harry appeared at one side and caught Neville with a knee to the eye. He vanished again and repeated it. Harry's aura dropped from 100, to 90.

Glynda smirked "Practise makes perfect. The more you use a technique the lesser amount of aura it takes to use."

Neville fell backwards swinging his hammer around, flowering his hammer. One of the things he learnt from Yatsuhashi and Adam was to flower his hammer around. However, flowering works more effectively went one is using a somewhat balanced weapon not a lump of metal on a stick. But flowering in essence things like hammers and oversized meat cleavers (Yatsuhashi Zanbato) is pretty intimidating.

"Screw holding back. I'm taking you out now." Growled Harry as he flickered away in crackle of lightning. Neville groaned, he couldn't see. One of the shows Harry had been introduced to was something called Attack on Grimm, a much tamer version of Attack on Titan, something Harry had brought over.

He knew what Harry was going to do. Harry and Ruby were possibly the only two student's quick enough and Harry the only one ballsy enough to actually perform it. Harry's aura dropped from 90 to 50. "Shit I'm burning too much for this but fuck it. This is going to be fun."

The attacks rained down on Neville, his aura dropping rapidly. But at this point in time much higher than Harrys. Then Neville struck, his arms dropped. He planted his hammer and then punched Harry in the chest. Harry hit the ground groaning, his sword rocketing away from him.

Harry summoned his sword, it hurtled towards him shifting form "HAMMER DOWN!" Harry went up, he caught his scythe. The ground shook, the arena cracked and the whole school shook slightly as Neville unleashed the explosive dust he had been storing in his hammer. He flicked a switch and it came up emerald green 'Thunder Dust'.

Harry dropped towards him, intent on finishing it, Neville moved and Harry could not activate lightning dust in time. He was nearly out of aura "Be gone with the Thunder." Neville incanted as he tapped Harry on the chest with the hammer and activated the dust.

Harry shot out of the arena and through the oak double doors to embed himself in the wall of Peter Ports classroom. Professor Port looked around to see one of his favourite pupils in the wall. "Mister Branwen are you okay?"

Harry groaned and he looked down "I think…I'm going to be sick…Fucking tanks…fucking hammers…Should be." Harry fell forwards and emptied his stomach onto the floor. Port chuckled, walked over to Harry's leg and with very little effort pulled Harry out of the wall.

"It is like this that I managed to carry the Alpha Beowulf from where I had tracked it back to this school, which happens to be in that particular crate over there…Class dismissed." Port said as he carried Harry out of his classroom and to the hospital with Harry's sword following behind them.

Harry it turned out was slightly concussed and was coherent enough to summon his sword which was now lying next to the beside cabinet whilst Port was getting a bandage for his hand "What did you put on that sword to make it burn me?"

Harry groaned "Blood bound it to me…It's ever slightly sentient and protective of me and mine. I can wield it because it is mine, Ruby, Yang, Mum and Dad can because they have my blood."

Port nodded "An effective mechanism…But isn't that magic? Isn't magic meant to be in stories?"

Harry grinned "I know what you mean. We live in a world our cars, electrical devices run on dried skin, meteor particles and various other things. It crystallises into elements that we use to fight monsters composed of fear, anger and hate which in itself sounds very much like a story. Now Professor Port, you tell me, how plausible is it to have magic?"

Port stopped "First of all, detention for three evenings next week. I think you require further intuition on the way to successfully trap Grimm of the Ursa kind without killing it. Second of all you have made some good points…Now I shall bid you a good day."

As Port left, Ruby and Yang entered followed by a sheepish looking Neville. "You okay?" They asked at the same time.

"Concussion…Aura broke when I hit Ports wall." Harry said relaxing on the bed.

Ruby looked rather pale, she looked frightened and slightly scared. Before Neville had arrived, she had thought her brother was invincible, even his team were invincible. She thought they were, calm and controlled Damania; noble and proud Nanuuk who was ready to fight for the little guy, stubborn and unyielding Adam who would see the nastiest jobs through and her brother; pure force and grit with a lot of charm always ready to throw down when and wherever. The school had seen HAND carve up the first years like a knife through butter, would fight with the second years on relatively good odds and scrap with the third years and lose…But Neville, he had just fought her brother one on one and handed him a loss ass over teakettle.

Harry grinned and grabbed Ruby, and yanked the hood overhead "Don't worry limpet…I'm okay. Better Neville than CRDL." Yang chuckled.

"There are pictures floating of you indented in Ports wall."

Harry shrugged "So what." He turned to the doctor "Can I go?"

"Take it easy."

The four left when they heard a voice with an accent that Harry would associate with Australia but in this case from Vacuo "Which one of you people is Neville Longbottom?"