Disney ACME Hot Art Limited Edition 500 JUMBO 3 INCH Ursula Pin. Ursula is the main antagonist of Disney's 1989 animated feature film The Little Mermaid. She is a villainous cecaelian sea witch who "helps" unfortunate merfolk to achieve her own goals. Ursula has become one of the most popular and iconic of all the Disney Villains since her debut, and is one of the franchise's primary members.ACME