This may seem like a tinfoil hat theory, but rewatching v3e1, when I noticed Yang looking back at Emerald and Mercury as they took their seats, bells went off in my head.

My biggest question going into Volume 3 was “what did Raven tell Yang?”. Raven has been gone for years, so she has to have been up to something. Considering she knew about Roman’s Mt. Glenn scheme (which is why she was able to save Yang’s ass in time), and that she was able to scare Neo enough to make her wipe her smug smile off and retreat, she must have knowledge and/or some level of involvement in Cinder’s plans. And that means, through Raven, Yang knows at least part of what’s going on.

If Yang looking back at these two has any meaning at all behind it, that means she knows about their involvement in the string of crimes, or at least has reason to be suspicious of them based on the knowledge she has. All this being said, the biggest question that comes to mind is why she hasn’t told any of her teammates.