Kid's ShowI wonder if there's like a Pantheon of Alicorns representing thingsMore Like This
Celestia is the Princess of the Sun and day
Luna is the Princess of the Moon, Night, and Dreams
Cadance is the Crystal Princess and Princess of Love (apparently[?])
Now let's add another layer. We know an Alicorn can be corrupted into evil because we saw Nightmare Moon. Now look at Chrysalis. Her form is something that closely resembles an alicorn. It's quite possible she was once the original Princess of Love, who got corrupted. Basing on a fanon that she was the Pony who accidentally took the love poison, it's probable that it in turn corrupted her and after a long time it changed her permanently to something she isn't.
Now let's recall how young Cadance looked. She looked like a regular unicorn when twi was young. Could it be possible that she was a normal Pony, unicorn or otherwise, who became worthy to become a Princess herself?
Lastly, King Sombra... Could it be that he was under training to become a Prince as we