“Idea I had recently.
 
Hair do’s of some lovely ladies which change depending on the time of day and their domain.
 
Celestia, of course, raises the sun in the morning and allows it to set in the evening, but I think she would have influence over various weather phenomena, such as wild fires and droughts. Her powers are strongest in the summer, when the sun is in the sky the longest.
 
Luna has precedence over the moon and stars, as well as the tides and meteor showers. She reaches maximum power in the winter.
 
Twilight is an ascended entity whose domain is Harmony. She is the balance between Celestia and Luna’s give and take between one another, as well as being a counter to Discord. She’s still young and learning to harness her powers, but in time she will be on a similar level to how we see the two alicorn princess now.”