Ocho (Legend of the Sea)

Ocho is a three-legged octopus who is the main antagonist in the movie, Legend of the Sea. In the past, she desired power over all living creatures of the sea, and it resulted in a battle against the Dragon King who sought to protect the Eastern Sea from Ocho's evil ambitions. After the battle, Ocho paid the price and lost five of her legs. She was banished from the Eastern Sea, but wasn't fully defeated.

Years later, Ocho plans to take the throne of the kingdom and also seek revenge by destroying the Dragon Pearl, as without it, peace and justice will vanish. Her plan was uncovered by Draco, the young son of the now elderly Dragon King, but Ocho captured the young prince and held him for ransom. When Draco escaped, Ocho and her minions eventually launched a full-scale attack on the Dragon Palace. She spotted Draco holding the Dragon Pearl and hurled a speared stalagmite to kill him, but the Dragon King took the blow instead to protect Draco. Ocho laughs in triumph as the Dragon King perishes, and soon orders her minions to seize the Dragon Pearl from Draco's hands.

Draco, powered by the Dragon Pearl, transformed into a full grown dragon and used his newfound power to once again banish Ocho from the Eastern Sea, ending the war. Elsewhere, the three-armed octopus swears vengeance, but she is soon presumably devoured by a pack of predatory stonefish.

Trivia

 * Ocho is very similar to Ursula, both are female evil octopuses and wish to rule over an underwater kingdom.