Winthrop is Underworld's technician. He checks on the electricity, makes sure any plumbing is in working order, and generally takes care of everything maintenance-wise. He restored and reprogrammed the robot Cerberus, and is responsible for its maintenance. Winthrop sleeps for a few hours in his little workshop off the concourse and is occasionally joined by his friend Greta.
This Old House: Due to a steadily declining supply of resources, Winthrop will trade the Lone Wanderer one stimpak, RadAway, or Rad-X in exchange for every five pieces of scrap metal. With a high enough Strength, he can be threatened into handing over ten stimpaks for free. After this, he will refuse to speak with the Lone Wanderer again.
"Now tell me, how is it that you ended up down here in Ghoul central without knowing what a Ghoul is? Huh? You know, never mind. I'm a Ghoul. Everyone down here: Ghouls. That's what we are. And before you ask "what's a Ghoul", lemme tell you. We're not the walking dead, despite the rotten flesh and the smell. We're mutants... sort of. At least, I think we are."