Brother Thomas

Brother Thomas (named Brother Andrew, Brother Simon, Brother James or Brother Matthew before Emogene Takes a Lover) is the leader of the "Pillars of the Community" cult located at the Charles View Amphitheater in Boston in 2287. Upon speaking to him he will try to convince the Sole Survivor to join the cult on the condition that they give him everything they own.

Background
If the player character goes through with it, Andrew will act surprised, subtly revealing that the entire thing is a charade. He will then tell the player about level one of the cult, saying for the player to repeat the phrase "I deserve a better life. A better life is coming. A better life is almost here". Afterwards he will say to keep repeating the phase until it is truly believed, then the player will be ready for level two. Andrew goes on to say that the player will know they are level two when good things start happening to them. This will leave the player without any items except key or quest items. The player character may break into the back storage room of the office to retrieve their items but doing so will result in Andrew and his followers becoming hostile.

If the player asks about changing their mind on joining the cult before being led into the office, Andrew will say there is no obligation to join though they have yet to have a member leave the organization. If the player changes their mind while talking to Andrew in the office, Andrew will say the player character is past backing out and must give him all of their stuff. This brings up the option to threaten him on allowing them to walk out. If successful, Andrew will allow the player to walk out peacefully. If not, Andrew and all his followers will turn hostile and attack. And yes, he is the Lone Wanderer, in the mission "Welcome to the Wasteland" He gives the jumpsuit of the vault 101 If you complete it.

Quests
Emogene Takes a Lover - it is revealed Brother Thomas tried to talk to customers of The Third Rail in Goodneighbor. He was eventually thrown out by Ham, but not before he could talk to Emogene Cabot and take her with him. He tried to talk her into joining his cult. But when she refused he locked her up. When the Sole Survivor encounters him, he tries to shove it off and say she's busy and that they are having relationship problems. He is then persuaded or killed, after which Emogene is 'rescued'.

Appearances
Brother Thomas appears only in Fallout 4.