Snegurochka/Снегу́рочка is a ”snow maiden” is Ded Moroz’s granddaughter.
There are many versions of her story, concerning Ded Moroz (Father Winter) she is supposedly the daughter of winter and spring. In the story she has her overprotective parents and she feels lonely until they feel sorry for her and let her out in which she dies having melted either from playing a game of jumping over the fire or falling in love as her hearts heats her up.
The story has been made into plays, operas, ballets and film. If you would like to watch it here are the links:
-The animated film 1952 (unfortunately no subtitles) http://www.youtube.com/watch?v=r-th6hyzT48
-The film 1968 (unfortunately no subtitles again) http://www.youtube.com/watch?v=PRjzI_7yXkE