I wonder if there's like a Pantheon of Alicorns representing things
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