Warriors are trained for battle, either in the schools and academies of Midgard, Alfheim (Elves) or Svartalfheim (Dwarves). Although some grow from the outlanders of thos places, having been toughened by the wilderness and born fighters.
The runes which are entwined with their bodies at birth are runes of combat and power. Solid strength and determination, and they use these when battling the forces of Hel, ensuring the power of the runes can devastate the enemies forces.
When it comes to more mundane things, like politics and people, warriors often struggle a little more than the other classes. Seeing their place in the heart of the battle and being the front line of the Sentinels.