For those of you who read 'The Dark Side of the Sun'

Contains a quote from the story so: spoilers.

Okay remember this part from the last chapter 'Celestia Speaks':

"Noctus and Lumina...if you are out there, if you still exist you broke the heart of your only daughter that day.

The one that never gave up.

And still hasn`t."

Maybe most of you ignored this but one crucial question in my later stories (sorry for that minor-ish spoiler) that comes to light is:

Which of the two sisters is the one mentioned in this passage?

Or for those of you who want another less important (in a way) question:

Why does Celestia say 'only daughter', there are two sisters?

Story will be tagged for those of you people who might give it a re-read, etc.