Notes. Harland claims he only joined the Bright Brotherhood for the "ghoulettes". ... Harland can die on his way out of the basement if the player doesn't wipe out the nightkin. However, it is not necessary to kill a single nightkin for Harland to sneak out alive; only mindful timing.

Is Harland a follower?

Recruit Harland from REPCONN as a fully voiced permanent follower.

What happens if I kill Davison Fallout New Vegas?

Effects of player's actions. If one has killed most or all of the nightkin - including the jailer - this can prompt him to attack the next time he is spoken to. He may immediately turn hostile, or he may tell the Courier that Antler told him they killed all the nightkin before turning hostile.