Luna wants to protect her little ponies too. It is her duty to step into their slumber and keep them safe from the horrors of the Dreamtime. But she has been away for a thousand years, and before she can help others face their nightmares, she must come to terms with her own. As she tries to transcend reality and enter into the sea of dreams, Luna remembers how she let hatred into her heart, and the price both she and her Nightguard paid for her fall.
Can she ever earn forgiveness for her crimes? Perhaps Equestria truly is better off with just one Princess to rule over the day and night. She is small, her body weakened by the Elements of Harmony, and this beautiful world her sister watches over has no need for her.
No. No, we will not be forgotten. It is our duty to guard the dreams of our subjects, and guard them we shall!