-Where is courier's home? One of the messages at the wreckage says "You can go home now, Courier Six." Ulysses, in a holotope, says "He knows the way" when talking to Christine about the divide and the Courier. Was our character born and raised in maybe, a Vault in the Divide? No one down there would feel them or hear them (the storms), considering its a deep, underground bomb shelter. It would...kinda make sense.
I doubt Courier Six would've originated from a Vault, he was given a Pip-Boy from Doc Mitchell and didn't have one before then. However, the idea that he originated from the Divide is quite tantalising...