Classes: Soldier.

I won't get into lore for spoiler reasons but essentially let's assume we learn the fighting methods of the empire, and thus learn to fight using a Gunblade.

Abilities: Level 1: Swap--switch freely between using a sword or a 6 shot revolver. 10 second recharge time.
Abilities: Level 1: Reload--takes 2.5 seconds to add in another 6 bullets into a gun. Can be interrupted. 15 second recharge time.
Level 3: Burstslash--Deal 110 potency with 20% chance of critical, uses a bullet. 80 TP. On GCD , 2.5 second recharge time. Slash damage.
Level 5: Splashfire--When shooting, 20 potency damage is dealt to enemies within 0 yalms of target. Trait.
Level 6: Cross-Cut--Deal 140% damage from front. 80 TP. On GCD, 2.5 second. Slash Damage. Starts combo.
Level 8: Soldier's Cry--Increase strength for self and party members by 10% for 20 seconds. 3 minute recharge time.