Blister

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Blister was one of King Arch's henchmen, along with Ripkins. He had the ability to blister anything he touched, to varying degrees of pain and damage depending on which finger he used.
Sometime after Redd's first defeat, he and Ripkins were sent to Wonderland to capture a Glass Eye, allowing Arch to build an army of them.
When Hatter Madigan came to Boarderton to negotiate for Homburg Molly, he and Ripkins were both quartered with him, to better track his movements.