The head researcher in the development of Dylar, a medication that eliminates the fear of death. He tests Babette and deems her suitable for trial treatment, but because of the dangerous side-effects of Dylar, he is soon abandoned by his research team. Nonetheless, he carries on in secret, striking an arrangement with Babette that, if she periodically visits him to have sex in his motel in Iron City, he will go on giving her Dylar. To protect Willie from harm, Babette shields his identity by calling him Mr. Gray when telling Jack about Dylar. This precaution ultimately fails, and Jack tracks Willie down in his motel in Iron City. There, Willie has become nearly incoherent and incapable of differentiating his own speech from the slogans and phrases he randomly spews during conversation, all the while taking massive amounts of Dylar. Jack shoots Willie twice in the stomach, and Willie shoots Jack in the wrist, which makes Jack come to his senses and take Willie to the hospital, saving his life after having decided—and attempted—to kill him.