This entire film is about feminism possessing women's minds
Diana is a mythological goddess, and a goddess of dianic wicca / witchcraft
dianic wicca is entirely feminist and goddess worshipping
Diana is also associated with light or alternatively with darkness, where her brother Apollo (sometimes associated with Lucifer) is associated with the light
The brother / sister theme is notable in this movie, represent a transposition of an aspect of the myth into the siblings in the movie.