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.

A/N: Thank you to everyone who has liked this story so far. As for those who have critiqued saying that they are slightly confused, I apologise. My brain goes quicker than I type and when I plan it's slightly better. I will try to make things clearer.

(Last time)

"Attach the car and we're leaving."

After observing a Faunus get threatened with Death, the substantial remaining force under Torchwick, scrambled onto the train. Then it began to move.

"They're insane! Where can they go!" Griped Weiss.

"Straight through something, and they're going somewhere. We have no signal…But I can try something." Harry said.

"Can you do it on the train?" Asked Oobleck as he extended his thermos.

"Can do, but I'm going to need people to defend me."

Ruby nodded "Then let's stop this train."

The Teams used Aura enhanced abilities, aside from Ruby who used her semblance to get onto the train. "To surrender immortality makes us human, peel back the armour, master the frailties and rise harder than before." Harry intoned as they saw his aura peel back.

Harry shivered "That was…unpleasant. EXPECTO PATRONUM!" He said forcefully, picturing Neville in his mind.

"Nev, train, Atlas tech, Faunus, destination Vale. Conclusion Grimm invasion. Countermeasure, get your shit and other teams into Vale. Yesterday. RIDE!" The patronus vanished, suddenly there was a crack, the air heated up and Harry staggered backwards, grabbing his shoulder.

"GAH! Son of a bitch. Someone shot me!" Harry growled. He concentrated on his aura and it appeared again, his wound began to heal.

"Harry, we need to get to the front." Adam said, Harry looked to find his partner grabbing him by the forearm.

Harry grunted, but curiosity got the better of him and he flipped the hatch in the centre of the carriage. It popped open revealing a grey metallic device attached with blue and red wires "Professor?" Questioned Weiss.

"Doctor." Reminded the teacher.

"Not needed." Commented Yang.

"What is it?" Ruby asked.

"That, is a…bomb…We really need to get to the front. Someone detach the caboose before we all get turned body parts." Harry suggested as Damania unsheathed her sword.

"Harry, it detached itself." The teams swore and jumped to next carriage.

"Keep playing hot potato, keep moving, keep moving."

"We need to check…" Protested Ruby.

"THEY ALL HAVE BOMBS!" Harry thundered "MOST OF THESE HAVE BOMBS…I fucking hate being right." Just then the first bomb exploded.

"About Grimm attack, Harry? You were right. Have you notified the authorities?"

Harry shrugged "I told Neville…The word will get out. How quickly depends on the procedure of the twatwaffles being wet drips…Ozpin will learn of this and that's all that is needed."

"The council…."

"Can kiss my Faunus loving ass…Welcome to Team HAND; common sense out the window and hitting things is necessity."

"Harry, we've got baddies." Said Ruby.

Adam sighed "Let's do this. Alive recommended."

"I'm so on the sofa for this." Weapons were drawn.

"This doesn't make sense." Said Yang, desperation in her voice.

"It makes good sense. Get us on the train, detonate train…increases fear. Have us put in mortal peril…more fear, hatred and anger. Add fast moving target and holes means we've got Grimm coming, Yang. Trust the psycho for once." Harry replied as his sword became a scythe.

"Get the humans!" Shouted a Faunus.

Harry sighed "Time to get our hands dirty. Remember why you're doing it and breathe out every time." The group nodded, and they charged forwards.

The first Faunus's eyes widened as suddenly Harry swung his scythe and a deep gouge appeared in his chest. He froze, blood poured out of him staining his grey pants and shirt a dirty brown.

Ruby gulped as she spun herself in a red rose petal hurricane, and five people fell unmoving and lifeless, heads were missing.

Adam sighed as he and Nanuuk stood side by side. Nanuuk struck and dodged, as Adam struck and Nanuuk dodged and dodged as Nanuuk struck.

Damania was acting as bodyguard for Blake, who was separating the caboose of the carriages behind them. She flicked to her sword and swung if with such skill that punctured the chest of the White Fang Member that had crept up behind her.

He stopped, blood gurgled from his mouth, with trembling hands he pulled the mask off. "Uncle! Uncle Richard!"

Suddenly her back erupted into pain, she grabbed her front. Looked down to see her hands were coated in blood and she sank to her knees. As she collapsed she howled in pain and shock.

Yang and Weiss had made into the train and were now joined by Ruby and a traumatised Blake. The four girls were coated in brain matter and blood. Weiss, was by far the worst looking. Her once gleaming white Atlesian battle dress, was dripped in blood, her hair with faint streaks of red. If it wasn't for the sticky feeling and ominous drip from her hair it would have looked like a wonderful highlights.

Yang and Blake looked slightly unnerved. Yang had seen her cousin get shot, get up and utterly incensed and as he rushed into the fight, he resembled nothing more than well…a Grimm. He had said he possessed a mercurial temper and it definitely showed. His battle mantra scared her.

(Flashback)

Yang, blew out the knee of a White Fang member, evidently a humanoid one. She didn't hear the gunshot, but saw the silver stag, heard the message and the swearing that Harry uttered.

She was oblivious to the fact that Damania was being mobbed. She had her own problems, she knew that she was more of a one to one fighter and that Blake complimented her style. She had obnoxiously not bothered to fight with other first years. She saw Damania go down and then the primal scream reached her ears.

Harry, cloaked in electrical dust, his sword ablaze and his eyes, fireballs charged forwards. The elements singing and crying a terrifying orchestral piece and Harry, the demonic conductor. White Fang, burnt, fried, incinerated, blown back, dismembered and on occasion fell to get away from him.

"Peace is a lie. There is only passion. Passion is strength. Strength is power. Power is victory. In victory my chains are broken. My soul shall free me."

(End Flashback)

But yeah. Ruby, was by far the worst. She had just seen her brother, her new role model, just lose his composure. They gathered themselves and they found themselves inside the train car.

(Oobleck)

He turned to HAND, who were painted in blood and guts. They were now sitting on the train, calmly shooting Grimm, like fish out of a barrel.

"Harry, go help RWBY. Adam, look after Damania. Nanuuk, with me. We're going to wreck those Paladins." With that Zwei, who had been with them the whole time, yipped and promptly became a fireball of death.

Harry got control of himself "I love that dog."

(NIKL)

Neville was in the gym. Accompanying him were Ron, Ginny, Velvet, The Twins and the rest of his team.

Ron was skulking in the corner, he wasn't liking the fact he couldn't boss these people around. He was giving Velvet a filthy look. Hermione was too.

Velvet sighed and she wandered over to the training ring "Alright, apparently some of you have an issue with me…Let's sort this out."

With that she pulled out her boxing gloves. Hermione and Ginny nodded and moved into the ring. Velvet smirked, she had been hanging out with Harry for too long.

Kobi, Isabella and Lava paused their workout, as did Neville. When the stag appeared in the room.

Velvet dodged a wild but powerful right cross from Ginny, caught the left and with one smooth motion chucked her across the ring, utilising the same momentum, she swept Hermione off her feet with a sweeping kick.

The stag appeared and its mouth opened "Nev, train, Atlas tech, Faunus, destination Vale. Conclusion Grimm invasion."

Neville stopped "Armour up. Alert Ozpin, wake the fucking school."

"Don't we have to notify the council?" Asked Hermione nervously.

"No…If we don't we can shift the blame onto Harry. They don't like him." Neville said grinning slightly.

Hermione sighed "Can he go nowhere without pissing off officials?"

"Technically they pissed him off. They tried to deny me basic service, so he injured three people for that. Five 'rent-a-thugs' his wording…And beat the crap out of three police officers when they shot Neville."

"Then there were the casual threats he made directly to the council when I had a chat with the Headmaster." Neville chipped in with a sadistic grin, then he took control "I need everyone prepped for combat yesterday and I want us in Vale securing a perimeter two days ago."

"Can we help?" It was one of the Twins.

"Don't be a dick, you obey us like mindless sheep then yes…I mean it Hermione, you have no protection from these things." Neville rumbled, as he pulled off his gym shirt and replaced it with his undersuit and began attaching his armour.

(HWBY)

Harry landed with a boom, causing the five females to jump "How do you want to do this?"

"This one is mine." Yang stated, Harry smirked and readied himself to join the fight.

"Ruby, Blake, Weiss…go ahead. We'll be along once we've parted this one from life."

The woman gulped. She was confident in their abilities but what she wasn't sure of was the, wiry, thin, gore covered new arrival. She unfurled her umbrella and went to block the three rushing her, only to find Yang in her face. She dodged backwards and received a heavy boot to the back for her troubles.

"Can't you do something?" Yang called as she went forward her shotgun gauntlets a blaze as she punched, shot after shot from her Shot Gauntlets.

"Unless, you want to join her in death then no…Hang on." Their opponent's eyes widened as the sword changed form and became a scythe.

The parasol, deflected the scythe with a deafening clang. Neo, rolled backwards going for one of the boxes only for it to explode. She gulped, the male had a semblance equipped for combat!

Harry lashed out, Neo activated her semblance. The duo hit the illusion, Harry spun, slammed his foot on the ground and launched everybody skyward. Yang landed heavily, Neo landed elegantly.

Harry jumped back, scythe becoming a rifle and he fired a burst. The rounds hit Neo, her aura held. Suddenly there was a blinding flash and the sound of thunder launched Yang unconscious.

"You shouldn't have done that. No stopping me now." Harry growled, he began to pulse dust out of his magical core and soon enough the room was coated in Harry's dust.

Neo's eyes widened, she opened her parasol. Harry smirked and chucked himself to the floor as he detonated the dust. Just then, he looked up as a crimson and black vortex appeared.

Neo, got up. Her body hurt something awful, she looked and for once she smiled. The male, she had just fought…was MOVING! She was then distracted by the humming sound as portal appeared.

Harry got to his feet, he stretched his hand out and White Absolution jumped into his hand. The woman coming out of the portal was wearing a full on Grimm Mask, shallow cut red and black dress, with armoured vambraces, black leggings and black boots and around her neck was a necklace that looked eerily like Coco's.

Harry turned, he saw his opponent pale, her aura flared. Harry launched a Firebolt and it hit an illusion. There was the unmistakable sound of a blade being unsheathed and Harry stared the woman down.

"You won't harm my daughter."

"You wouldn't kill your brothers son, would you, Raven?"

Raven stopped and removed her mask and she looked at her nephew and she smiled "You look so much like him and your mother. How are they?"

"Well enough. If you're staying, awesome. If not well best get going, I have more blood to spill."

Raven nodded "Be…careful, nephew."

"Stay safe."

Raven turned and vanished. Harry sighed, that encounter made him believe he had just avoided making a deal with the devil.

(RWB)

The three members of RWBY, clattered into the next carriage. They did it just in time as they suddenly heard, gunfire, screams of outrage and massive explosions that rocked the two carriages.

"Your…brother…needs…to…learn…control." Stated Weiss as she adjusted herself to prevent being thrown off balance by the explosions.

Blake shrugged "It has a charm to it." As they went forwards they were met by a burly looking Faunus wielding a chainsaw.

The three of them made very, very short work of the Faunus. Mainly due to the fact that Ruby and Blake kept him at bay with a barrage of wide, fast but dodge able attacks, combined with Blake's swarm of attacks whilst Weiss utilised her glyphs and she and Blake dispatched the Faunus.

By now Team HAND and joined them. Damania's body rapidly healing (Don't remember her semblance so it is healing). "We need to stop this train…But the doors locked." Moaned Ruby.

Everyone bent double as a massive explosion rocked the carriage. The door was no longer a problem and neither was the wall. Roman Torchwick looked in a very bad way, well one kind of does when they've received a flat of metal to the face.

As the teens moved to secure the train, they noticed the brick wall. Team RWBY were sheltered in ice "This is going to suck." Damania said as she sheltered by Nanuuk.

"So badly." Agreed Adam as he braced himself for impact. Harry waited, the split second before they hit, he fuelled wind dust around him and he jumped.

(Beacon Academy)

If you could imagine s hornets' nest of activity, then that is how Beacon Academy currently was. Students running everywhere, strapping armour on each other, themselves, checking ammo, honing swords and scrambling for Bulkheads.

NIKL, JNPR and the guests rushed on to a Bulkhead and they were heading to the city.

Neville was tense, he had even got clearance to use illegal shells "Do we have a plan?" It was Hermione who was asking.

Isabella, had Neville's helm in her hands and without looking at her responded "We do our job…You and your colleagues, sit still look pretty and don't get in our way."

"What about the authorities?"

"We ARE the authorities in this case. Besides, if the Council tries to intervene…well…we'll cross that bridge and pray Velvet gets to Harry before the Council." Kobi commented as he checked his tires, this was going to be fun.

"Isabella, you good?"

"Yup It's time to dispense justice as it ain't gonna dispense itself."

"Kobi?"

"I'm on fire boss…Well, more than usual."

"Lava?"

Lava checked her bombs and pistols "I believe these are for them, love."

Neville pulled his helmet on "Time to be the shield again."