You are Toph’s sister, you were watching Toph beat the others butts at Earth Rumble Six. You are a good earth bender like Toph you were there when he asked Toph to be his earth bending teacher

Aang: listen! I’m supposed to have an earth bending teacher and I think it’s supposed to be you!

Toph: Who ever you are just leave me alone.

Aang: Wait!

you look at Aang but go back to walking with Toph