I love magical-girl anime series, and this anime is one of my favorites, along with Princess Tutu,Kamikaze Kaitou Jeanne,Mermaid Melody Pichi Pichi Pitch and Sailor Moon.
There are parallels to fairy tales in this anime,like Himeno's mother dies when she's very young, but her poor, novelist father remarries a wealthy widow with two daughters just like in Cinderella and there are several parallels made from the Snow White fairy tale. First, the 7 knights correspond to the 7 dwarves (or 7 knights in the Russian version by Alexander Puskin). The title itself, is a superficial connection, bearing more in relation to the nature of Himeno's growth and role than to the actual Snow White tale. The kiss at the end of course comes from the awakening of the princess by her prince, including Snow White. The other parallel is the Queen and Snow White to Takako/Fenrir and Himeno. While there's the obvious Queen Fenrir seeking out the pure Princess Himeno (as her knights call her), the two also represent the two sides of the feminine, the balance of destruction and dark to the renewing and maiden. The Queen is like the crone, the bringing things to their natural end and the maiden the one to bring the next generation to life (as in the original Snow White) and Himeno fulfills the role literally through her powers as Pretear. Indeed, the knights say the only difference between the Disaster Queen and Pretear is the power to give or take, and one can choose to be or do one or the other.
I love Himeno & Hayate they're a cute couple; Overall, this an excellant show to watch - Thumbs up all the way!