Ruby was not happy. Her sister had a Grimm mask, and had joined the White Fang. It didn't make sense, it was a stupid impulsive decision that went against everything they stood for. Yang had turned her back on what team RWBY meant, and not just to each other. Why would she do something so stupid, impulsive and wrong?

Jaune replied with an uncharacteristic world-weariness in his voice. "Stupid, impulsive and wrong, but makes sense - I've seen this happen before. But if the Fang let her in they're hurting far more than I thought. Good."

Ruby hadn't known that she was speaking aloud. Still why did Jaune say he had seen this happen before? Wait, Jaune when he arrived tripped over everything including his name. So Ruby knew she was going to need an explanation and fast. Jaune must have noticed her glare because he spoke.

"Ruby, you need to understand how secret this is. A child with a human and a faunus parent is always one or the other. So depending on where you are and which parent you look like, their lives can be drastically different. Some faunus can without close examination pass for human. Before you jump down my throat, Ruby, yes, I know faunus are human, but this is the best way to explain. Now remember that Yang was saved on the train by someone wearing a Grimm mask. Understand that For Yang everything she believed has turned upside down. And her reputation has taken a nose dive. If Beacon was still open and she still had her arm, she'd have the way to get out we need."

"We, Jaune?"

"Okay, Yang and I take after our fathers. For her it was a blessing. Still suspicions likely hung over her until your arrival. And no, your weapon doesn't help, but knowing Qrow was a friend of the family marked you as a faunus sympathiser. And a good reason for a 'pure' human to have a scythe. So what's happened for Yang, is the fact she has a faunus parent come out. Beacon collapsed and without her arm the only job we can really get is no longer an option for her."

"Still the we, Jaune?" Ruby insisted. When Ruby had a bone that she didn't want to let go, she was a complete terror or as Yang would say terrier-or.

"We also don't smell right. Part of the reason Blake still avoids me. Not entirely though. I think she felt my incompetence was a mask, and I was the Schnee's assassin. At least until she got put on a team with the Weiss Schnee herself."

"You smell okay to me."

"To you I would, but to everyone else it's mostly subconscious. Our scent tends to be in between. But for you that smell would be normal. Your sister and your uncle meant you were used to faunus smell. But Weiss was even worse than usual with you, because it rubbed off. Pyrrha was used to the smell herself from tournaments. It's probably why Blake chose Yang, extra layer of mask. Don't forget Blake wasn't hiding from humans - except as coincidence - she was really hiding from the White Fang."

"And her faunus parent was why Yang could get away with what would be racist jokes from other people. Back to why you keep on saying we about my sister and you?"

"Your sister was human in a government-controlled area. I was human in a Fang-controlled one." Jaune almost spat the name Fang. "We're the real reason the Fang hit peaceful groups. Larger proportion of mixed marriages belying both sides propaganda. It's also why I spoke by instinct about Blake being faunus. In a Fang-controlled area better to let people know the bow is for benefit of humans."

"So not an Arc?"

"No, these really are my grandfather's. But unlike Yang's mother, mine couldn't hide her faunus traits. So pretty hard to marry for humans. The last mission my father ever went on was to get the money so he could pay the right bribes to legitimise the marriage."

Ruby had heard this sad, desperate story a few times from Uncle Qrow and was now kicking herself. All the clues were there but she had never managed to put them together. Faunus areas were poor. But Fang recruiters would give basic training to faunus, and help them with lessons. But train the enemy? Very unlikely at best. And that would explain where Jaune had heard Weiss sing. In one of the charity/PR concerts she put on. Things about Jaune were finally making sense. His muscle was the only way to defend himself. His family's complete over-protectiveness. And the ancient but basic weapons. And the fact he tripped over everything including his name when he arrived. Jaune's complete ignorance and his ability to catch up so fast also made sense. His hoodie was like Blakes bow. Blake's bow hid the fact she had had ears, by using a faunus sympathiser fashion while Jaune's hoodie had previously been used to hide the fact he didn't. And the Pumpkin Pete symbol also finally made sense. To humans he had started as horror story before becoming a cereal mascot, but to faunus she had been a hero.

"I am so sorry I laughed at your hoodie. I apologise most profusely. It was stupid and insulting. Of course you'd have had to use cereal boxes."

"Okay, what brought on this change?"

"Your sisters, they're all faunus aren't they? And she's your ancestor on your mother's side. An Arc and a Peat? Wow, no wonder you have so much pressure on you, even if they didn't mean to inflict it. "

"Yes. Unlike Yang, I grew up with this knowledge and would never make her mistake. But she's not the first apparently human half-breed to have tried to join the White Fang when humans rejected her. It's her incredible success that's unprecedented."

Ruby breifly wondered whether in another universe, a rabbit faunus was hiding the Arc symbol, while displaying the Pumpkin Peat proudly before replying to Jaune. "So, you're basically saying Yang's discovered a new side to herself and dived in head first, without thinking of the consequences? She needs to be pulled out." Ruby sighed. This made so much sense. It was Yang who always chased down things without planning or forethought.

"Yes, but at the right time. Too soon and you're stopping her from learning, and too late and.."

"Yang will have gone native."

(A/N) Completely logical but Jaune is wrong. The White Fang aren't hurting anywhere as much as he thinks since Yang actually got her position in the fang by nepotism. She kept it by being successful. Of course she is helping divide them.