Elsa (Frozen) of the song "Let It Go", with critics frequently calling her a "powerhouse". Attempts were made as early as 1937 by Walt Disney to adapt Hans Christian Andersen's fairy tale, "The Snow Queen", into a film. The tale focuses on two children, one named Gerda, who served as the basis for Princess Anna, and the other named Kai, who is "cursed with negativity" after his heart is pierced with a shard of glass from an enchanted mirror and is later kidnapped by the Snow Queen. However, Disney struggled with creating a believable, multi-dimensional adaption of the fairy tale's title character,
The Little Mermaid (1989 film) Andersen tales. Development started soon after "Snow White and the Seven Dwarfs" in the late 1930s, but was delayed due to various circumstances. In 1985, Ron Clements became interested in a film adaptation of "The Little Mermaid" while he was serving as a director on "The Great Mouse Detective" (1986) alongside John Musker. Clements discovered the Hans Christian Andersen fairy tale while browsing through a bookstore. Believing the story provided an "ideal basis" for an animated feature film and keen on creating a film that took place underwater, Clements wrote and presented a two-page treatment of "Mermaid" to Disney CEO