Kaine

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Kaine, now known as Kaine Parker, is a former supervillain turned hero and ally from Marvel Comics. He is the first clone of Spider-Man created by the mad scientist, the Jackal. First thought as a success, Kaine eventually became deformed and degenerate as he was slowly dying and was left mentally unstable due to a flaw in the cloning process. He would become the arch nemesis of the original Scarlet Spider and later on an opponent to Spider-Man. After helping to stop the Jackal and Spider Queen during the events of Spider-Island, Kaine became a local vigilante during his stay in Houston, Texas as he eventually became a reluctant superhero while trying to make amends for his past.