Fighter

Fighter is a base class in the Fire Emblem series. It has many different variants, and may differ from game to game.

In Blazing Blade
This class uses axes, and has a high Health and Attack base.

Notable Fighters in Blazing Blade: Dorcas, Bartre.

In Awakening
This class was named Barbarian in this incarnation of Fire Emblem, and resembles the Bandit/Brigand type classes in previous games, having the axe weapon type as its choice and demonstrating high stats in health and attack with low defenses and resistance. It can promote to Warrior or Berserker after using a Master Seal when a unit is level 20 or higher.

Notable Barbarians in Awakening: Vaike.

In Fates
This class bears an axe as it's sole weapon of choice. It boasts high health and attack, but low defensive strength. It can promote to Warrior or Hero after using a Master Seal when a unit is level 20 or higher.

Notable Fighters in Fates: Arthur, Charlotte

In Echoes: Shadows of Valentia
This is a sword wielding class and the starting class for the male protagonist, Alm. This class is notably different from other incarnations, and seems to only bare a similar name.

Notable Fighters in Echoes: Alm