Banishing her sister to the moon for a thousand years was a painful choice to make. Celestia still misses Luna sometimes. The loneliness can get unbearable, and Celestia takes time to think over the choices she made and ruminate on her guilt.
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Inspired by "Your Own Sky" by PrinceWhateverer.
Rated T to be safe because there is some blood in this and something a little gory so be warned.