Supposedly, the face within a core of a Snomie is the true form of this Pokémon and everything else is just a shell. Only the rear star can spin, which creates a force of air that spreads the cold air breathed out from the face within the core.
People in ancient times imagined that Snomie were transformed from the reflections of stars that twinkled on gentle waves at night. They tend to move about in groups of around five Snomie.