Pure Evil Villains who were once saved by heroes, and in some rare cases even Pure Goods. Though rather than expressing gratitude, they resort to backstabbing the heroes and/or leaving them to their own demise instead of returning the favor, even if doing so will hurt them more than it hurts the hero.

Ironically, the same heroes may later choose to kill them after discovering their true depravity.

Examples are:

• Lotso, who was saved by Woody and Buzz from being ground up in the landfill.
• Syndrome, who was saved by Mr. Incredible from dying in an explosion by a bomb that he had on his cape as a child.
• Judge Claude Frollo, who was saved by Quasimodo from falling from the top of Notre Dame Cathedral and being cremated.
• Micah Bell, who was saved by Arthur from being hanged in the town of Strawberry after being sentenced to the death penalty for double murder.
• God (Supernatural), who was saved by Sam and Dean Winchester from his sister Amara in revenge for sealing her for eternity.
• Sir Benedict Cumbersnatch, whom Meggy attempted to warn that his drone would explode, however he doesn’t listen and presumably still does it to escape his arrest.
• Frieza, whom Goku gave energy to escape Planet Namek, was saved by both Gohan and Android 17 from being eliminated during the Tournament of Power and then saved by Gogeta from Broly.
• Green Goblin, whom Spider-Man saves from the Vulture in his Norman Osborn persona.
• Prophet of Truth, who was saved by Vadamee from being executed by Zhar.
• Multiple versions of the Joker, whom Batman often saves from being killed from other heroes/villains or will save him personally due to refusing to kill him.
• Graydon Creed, who was saved by Beast from dying incinerated in his burning laboratory in "Time Fugitives".
• Eobard Thawne, who was saved multiple times by Barry from getting erased from existence again.
• Lonnie Machin, whom Oliver Queen saved from being burned to death by his sister Thea.
• Professor Kindly, who was saved by Rico Caliente from getting smashed by a bowling ball by Rico's dad.
• Emma Grossman, who was saved by a caretaker who killed Emma's father David who was about to kill Emma. The caretaker didn't know Emma was evil, David did.
• Zeus, who was saved by Athena at the cost of her own life as Zeus's death will cause the destruction of Mount Olympus and Greece.