I only own my OC.

Yin was almost surprised to hear Professor Goodwitch behind him.

"Who are you and why are you on Beacon grounds?"

She asked, her riding crop in her hand. Yin watched her hand warily. He'd been warned about what she could do, and wasn't necessarily keen on fighting her. Though he would if necessary.

"I'm the transfer student from Shade Academy."

He said firmly. He was incredibly calm about the whole situation. Mostly because he was confident in his abilities. Which would be why he hadn't fled quite yet.

"Prove it. Name?"

Yin stood his ground bravely.

"My name is Yin Xiao Long-Branwen. I'm the transfer student from Shade Academy in Vacuo."

He said calmly. Managing to disguise his temper towards the situation.

Glynda looked the boy over. He did have a few of the traditional Branwen traits, and a few more Xiao Long traits.

"So if I were to call Yang Xiao Long down here she would recognize you as her brother?"

Yin was on the verge of snapping, his main focus going into keeping his eyes from turning red.

"My sister and I have never met. Ever. Not that I could remember anyway."

Glynda was about to continue interrogating him when Professor Ozpin walked over to them.

"Hello Mr. Xiao Long-Branwen."

Yin looked at him.

"Branwen is fine sir."

He responded immediately. Ozpin smiled a bit, as if he knew the teenager in front of him preferred to be called by his true last name only.

"Of course Mr. Branwen. Right this way. I understand you were a one man unit at Shade Academy?"

Yin nodded in the affirmative.

"Yes sir, though I frequently worked with Team NDGO for group assignments."

Ozpin nodded. He'd been told that the lone Branwen had been a frequent ally to another Shade Academy team, so it wasn't a surprise to him.

"Very well. You will be added on to Team RWBY lead by Ruby Rose. It's another all huntress team."

Yin nodded firmly.

"Understood sir."

He responded, still masking his emotions as Ozpin guided him to Team RWBY's dorm room.

Knocking on the door, Ozpin stepped out of the way as the door opened to reveal the youngest student of the school, Ruby Rose.

"Hi Professor! Who's he?"

Ozpin smiled as Yin started analyzing his chances of surviving being struck with the scythe he could already see leaning on the wall behind the girl. Ozpin looked at Yin.

"This is our transfer student from Shade Academy in Vacuo. Since he was a one man team at Shade, we've decided to put him on Team RWBY. Your team name will not be changing."

Yin tilted his head.

"Sir, their name wouldn't change anyway. My name starts with a Y."

Ozpin laughed and walked off as Yin looked back at Ruby.

"Uh….hello?"

Ruby almost instantly launched herself onto him, giving him a bear hug.

"HI! Welcome to Beacon! I can't wait to work with you!"

She said energetically. Yin didn't question it, considering she was still clinging to his torso.

"I look forward to working with you as well."

Ruby grinned as she got off of him, practically dragging him into the room before shutting the door, getting the attention of the rest of her team.

"Hey everybody! Professor Ozpin decided to put the Shade Academy transfer student on our team!"

Yin said nothing until Weiss Schnee spoke.

"Ruby, do you even know this guy's name?"

Ruby blushed.

"I…..uh….I know it starts with a Y?"

Yin decided to let her play a bit of a guessing game, and was as obvious as he could possibly be.

"I'm the opposite of Yang."

Yang looked up and realized what he meant.

"His name's Yin."

She said before going to lay back down. Weiss and Blake looked at her.

"How'd you know?"

Yin spoke up.

"Did you ever hear of Yin and Yang, one cannot exist without the other?"

Weiss nodded before letting out a slight 'oh' sound. Blake catching on shortly after.

"What's your last name then?"

Blake asked. Weiss nodding. Yin looked over at Yang and stepped back.

"Technically? Xiao Long-Branwen. I normally just go by Branwen though."

Yang sat up so fast she almost hit her head and looked over at him.

"You're kidding."

Yin shook his head and looked into Yang's eyes, his eyes going from a matching shade of lilac to her own to a bright shade of red.

"Yep, he's related. Hi big bro!"

Yang called before tackling him in a hug. He didn't mind it though. Despite his normal stand offish personality.

"You have no idea how long I've waited to meet you. And Ruby. Can't forget Ruby."

He said before returning the hug. After a moment he realized he'd nearly forgotten to do something.

"Crud, I forgot to call Nebula and the others. Anybody feel like meeting my other adoptive sisters?"

Yang and Ruby nodded brightly and after a moment, Blake and Weiss decided to go along with it. Yin pulling out his scroll and sending a call through to Nebula, knowing that the girls had an off day.

"YIN!...you already replaced us big brother?"

Nebula asked, faking tears. Yin chuckled at her little act.

"I didn't replace you Neb, nobody is quite like you. Where is everyone?"

The moment he said that Octavia, Gwen, and Dew jumped onto Nebula's bed to talk to him.

"I suppose that answers that question."

The girls laughed and Yin looked at team RWBY.

"Alright then, now that everybody's here, Nebula, Octavia, Gwen, Dew, I want you all to meet my twin sister Yang, younger sister Ruby, and their partners Weiss Schnee and Blake Belladonna."

The four girls introduced themselves properly and Yin was enjoying being able to spend a bit of time introducing his new friends and family to the four girls who'd basically become his family during his time at Shade Academy.

"Well it was nice meeting you all!"

Ruby said as Team NDGO had to go do homework and Yang decided to call her Dad.

"We should probably tell Dad there are two of us now."

Yin nodded and the next call that was made very nearly resulted in Yang having to call her Uncle Qrow to make sure her father hadn't rolled straight down the stairs.

"You'd think he didn't know he had a son."

Yin said stoically, managing to make both Weiss and Blake laugh loudly, Yang and Ruby joining in shortly after.

Another A/N

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