Ursula

Ursula is a villain from the Kingdom Hearts games.

Ursula the Sea Witch first appeared in the 1989 Disney film The Little Mermaid. Classified as an "octopod," she is an obese purple witch that was once a senior member of King Triton's court. However, she was banished for her love of Black Magic. With the "help" of Ariel, Ursula got control of the trident and almost succeeded in taking over Atlantica. However, Prince Eric killed her.

Ursula has two pet eels, Flotsam and Jetsam, whom she refers to as her "poopsies." She also has a sister named Morgana. The two siblings were rivals to each other; Morgana felt that Ursula considered herself superior to the younger witch.

In Kingdom Hearts
Ursula was one of Maleficent's followers, and assisted by lending the powers of the ocean. With Ursula's help, the Heartless entered Atlantica. As per usual, Ariel stole the trident from King Triton, and Ursula grew giant, just in time to battle Sora. She wielded powerful Thunder magic. However, Sora defeated her.

The prize for defeating Ursula is the Crabclaw keyblade and a Thunder magic upgrade.

In Kingdom Hearts II
Revived by the powers of darkness, Ursula returned in Kingdom Hearts II with seemingly no memory of Sora or anything involving her in Kingdom Hearts (similar to Oogie Boogie, though he still controlled the Heartless). She tricks Ariel into turning into a human girl, and almost succeeds in taking over Atlantica much like in the movie. However, as in the movie, Prince Eric kills her. The battle against Ursula in Kingdom Hearts II is a staged performance in song.

The prize for defeating Ursula is the Mysterious Abyss Keyblade and a Blizzard magic upgrade.