Lucas Miller

Lucas Miller is a traveling merchant operating in the Commonwealth in 2287.

Background
Lucas Miller is one of the traveling caravan merchants operating out of Bunker Hill. He specializes in armor and clothing. Escorted by caravan guards, Miller does business in the northeastern region of the Commonwealth, passing through Tenpines Bluff, Greentop Nursery, Covenant and later on, Outpost Zimonja.

Itinerary
Lucas and his pack brahmin, "Ol' Girl", along with two caravan guards, normally run a continual circuit between Greentop Nursery, Tenpines Bluff, and Covenant. He will take various routes between some or all of these stopping points. At each of these locations, he will halt for approximately eight in-game hours.

If he is encountered leaving Bunker Hill, he will first transit to Greentop Nursery, before resuming his normal circuit. His route takes him northeast toward County Crossing, then northwest to Greentop Nursery, where his circuit begins. If the player character fast travels back from another cell to the location where Lucas is currently halted (including Bunker Hill as well as his circuit stops) or sleeps in or near one of these locations, his departure will be delayed until shortly after they arrive, or wake up.

As with other Bunker Hill traveling merchants, Lucas's appearances at Bunker Hill are entirely random, and he will not leave there if the player character waits, only if they sleep or leave the cell and re-enter it. As such, it is possible to follow him out from, but not to, Bunker Hill from another cell.

Appearances
Lucas Miller appears only in Fallout 4.

Behind the scenes
Although he can't be recruited for settlements without tweaks he still has the "WorkshopNPCScript" on him, hinting that he might have been intended for settlement mode.