[@Zugzwang] Okay! Fully read. I'll just be honest and say I loved Yang. Perfect level of detail and a very interesting character; so much so that I'm happy to accept her the way she is since as far as I know nobody else is interested in the airbending role. The only thing I'll ask you to do before you post it in the character tab is color the sheet (her name, role and quote and all of the headings. I know you probably didn't because this was a draft and that's fine!) 

I'm assuming you're not going down the route of spirit projection as a sub bending ability in exchange for the firearms and eventually Flight? Which is fine. As for her impact, I'd imagine it was pretty large and that her contributions are probably well known. Maybe something on the level of Book 3 Asami? Lots of reputation and many people in the field recognize her abilities. Since the White Lotus want the team to be as covert as possible I'd assume when they thought about bringing her in as the Airbending Instructor they might have helped conceal her identity a little and made it so some of her accomplishments aren't in HER name.   

I shall update the roster.