Who is the Donor in the movie The Little Mermaid?

In "The Little Mermaid," the Donor is the sea witch Ursula. She plays a crucial role in the story by offering Ariel, the mermaid protagonist, a deal to trade her voice for human legs. Ursula's character embodies the archetype of a manipulative figure who grants wishes but with ulterior motives, ultimately leading to conflict and challenges for Ariel.