[@Kingfisher]

"A Mary Sue for female characters and Gary Stu or Marty Stu for male characters is an idealized and seemingly perfect fictional character, a young or low-rank person who saves the day through unrealistic abilities. Often this character is recognized as an author insert and/or wish-fulfillment."

There is no other way to travel from England or Ireland to America in any other way then with a boat, seeing as there are no functioning planes that can fly such large distances.

Out-witting isn't the form of strength Super Mutants look up too, they look up to smashing and breaking things.

Again, Mary Sue because your sixteen year old girl character one, takes down a Super Mutant and two is suddenly the best person to lead that clan and manages to overcome all odds and others clans to become the biggest without anyone else seemingly questioning her authority. Just, like, that.