The Far Harbor settlement locations of Dalton Farm, Echo Lake Lumber, and the National Park Visitor Center each have a quest associated with them, and upon successfully completing those quests, the quest givers send their friends to live at the settlements. These settlers differ from common workshop settlers in that they have unique NPC (Actor) records with unique face/body data, making them comparable to the settlers at Tenpines Bluff, Oberland Station, and other Commonwealth settlements with preexisting but unnamed settlers. While the settlers sent to Dalton Farm and Echo Lake Lumber are fine as is, the Visitor Center settlers are broken.

To be precise, both Visitor Center settler records are incomplete, having both male and female data, as well as some data that is completely missing, resulting in a pair of settlers who combine elements of both default Nate and default Nora. The first solo screen shot shows how both appear in a vanilla game, as their body/face data is identical. If you look closely, however, you'll notice that the hair is default Nate and the eyes are default Nora, while the mouth is a strange combination of both.

Face Fixes - Visitor Center Settlers corrects this by dividing the mixed data into separate records, adding the missing data, and tweaking the results to produce unique faces for this pair (see remaining screen shots).

Compatibility
At present, this mod is incompatible with my We Have Names (and more) - All In One mod, although I will remedy this at some point in the future. Otherwise, this mod should be compatible with anything that doesn't modify the same NPC (Actor) records.

My Face Fixes Mods
Face Fixes - Wasteland Travelers 
Face Fixes - Institute Scientists 
Face Fixes - Vault 81 
Face Fixes - Pack Captives 
Face Fixes - Visitor Center Settlers 
Face Fixes - Caravan Guards 
Face Fixes - Nucleus Children of Atom