“The prince and princess celebrate on a wedding ship, and the Little Mermaid’s heart breaks. She thinks of all that she has sacrificed and of all the pain she has endured. She despairs, thinking of the death that awaits her, but before dawn, her sisters rise out of the water and bring her a knife that the Sea Witch has given them in exchange for their long, beautiful hair. If the Little Mermaid kills the prince and lets his blood drip on her feet, she will become a mermaid once more, all her suffering will end, and she will live out her full life in the ocean with her family.
However, the Little Mermaid cannot bring herself to kill the sleeping prince lying with his new bride, and she throws the knife and herself off the ship into the water just as dawn breaks. Her body dissolves into foam, but instead of ceasing to exist, she feels the warm sun and discovers that she has turned into a luminous and ethereal earthbound spirit, a daughter of the air.”