The Winter Queen is a monster in a lady guise who appears in the videogame Dragon Quest V. She's the one responsible for trapping Fairy Lee and all of the Fairy World in a perpetual state of winter, which also affected the Hero's world. She also tricked Dwight into becoming her subordinate after from Fairy Lee. By a request of Honey, the Hero must climb the Tower of Winter and defeat her.
She's really similar to the common enemy monster known as Blizzybody and like them, can use ice spells like Crack.
She is likely inspired by the notorious character in the novel, The Ice Queen, specially if one takes into account her japanese name. Interestingly enough, there is a character in the subsequent installment, Dragon Quest VI called Gerda who shares even more similarities besides her name.