Lucy MacLean is a Vault-Dweller, turned Wastelander. In the early stages of her journey, she initially possessed an overly optimistic and excessively kind demeanor. However, the harsh realities of the ruined world she now navigated quickly hardened her into a strong and determined woman. While Lucy maintained her moral compass and still made efforts to act ethically, years of hardship had taught her that difficult decisions sometimes needed to be made.