I was once known as Princess Luna. But now, most ponies know me as Nightmare Moon. But there's a part of my story that not many know. Here, I'll start at the beginning.
This is my story.
My sister and I, we were as close as could be. I was fooled by her. She treated me as her equal, and I fell for her trap. Now I know the truth. That she will always be stronger than me.
At first, I tried not to let it get to me. Until one night, I snapped. That was the night I refused to lower the Moon and make way for the Sun. That was the night I transformed into Nightmare Moon.
But you all know that part of the story. Here's the part you don't know. Celestia's magic was just strong enough to make it so that for a few minutes every night, I am Princess Luna once more.
I cherish these moments, but I also resent them. These are the moments I relive the damage I have caused. These are the moments I remember the tears streaming down Celestia's face. These are the moments I remember her whispering "I'm so sorry".
I don't want to be a monster anymore.