Promise.

Luna's confessment to her dear big sister,Celestia after they were was reunited,and the promise they bother make to each other.

Waiting,watching,her standing there with a horrified face.Filled with pain and disappointment.I tried not to go completely insane.She looked at me hard and powerful.This way,I thought I was more powerful.Why couldn't I have been more powerful?Stronger?More..more..loved?

Why couldn't she just understand?