John Kruk is a siren, and "sisters" with fellow Sirens The BJ Queen and Chrysanthemum. He appears in Sirens.
He was originally a baseball player for the Philadelphia Phillies until he is kidnapped by Chrsanthemum and the BJ Queen. They force him into becoming a siren, and now spend their days horribly torturing him by nailing his wrists to the wall, stripping him of his skin from the waist down and simultaneously stabbing him with a harpoon and sprinkling salt on his raw flesh, though it is revealed that this is simply a twisted sex act.