The best stories are simple. Just go back to your outline as @[96554:@Roszhelhia] said, and son't make it too complicated, that will require (extra) gameplay-slowing exposition and infodumps. Just, keep it simple. For your first game at least.
What are your favourite video game characters of all time? RPG, FPS, Platformer? Doesn't matter!
My personal favourites (in no particular order) :
John Marston : Red Dead Redemption
Crono : Chrono Trigger
Morte : Planescape : Torment
The Nameless One : Planescape : Torment
Andrew Ryan : BioShock...
A great solution to this, that I'm using in my own game to preserve the feeling of ye olden times, is to use Early Modern English, seen in many of Shakespeare's writings. It's pretty easy to understand (imo) and a great way to keep the player feeling like they're in the time period.
:/ it really get on my nerves reading stuff about how to write a resume and they say things like "turn your failures into wins!!!" ... no interview Ive ever had cared to hear anything about my failures, and why would they ?