Complete Monster: Madame Lorraine is a seductress who makes a practice of enticing men and luring them into her clutches. Once she has them, Lorraine coldly shoots them dead, takes their money, and has her flunkies dump their bodies in a mine shaft. Lorraine comes into conflict with Jonah Hex after she kills one of his bounties and attempts to repeat the process on him. Once Hex forces Lorraine to show him where his bounty's body is, Lorraine shows him into the mine shaft, where the decaying bodies of all the men—at least 15 victims—Lorraine has killed are seen.
Nightmare Fuel: The ending. After collecting his bounty, Hex leaves Lorraine to rot away and die all alone in the dark pit where she dumped her victims.
Gets worse when you realize that Lorraine will die slowly of thirst and starvation, and that there's nothing she can do about it except think about all the evil she had committed to deserve it and presumably eat the corpses of her victims to fight off hunger.
What an Idiot: Lorraine tries to kill Hex once again, and is surprised at the fact he isn't going to save her.