Commando is a straightforward attacker with few command abilities. Its main purpose is to deal heavy damage to enemies, particularly when staggered, and most of its attacks slow down the chain gauge's depletion. Lightning, Sazh, Snow, and Fang major in the role, and Snow and Fang's full ATB skills are Commando abilities.
Commando returns as the straightforward attacking role, and maintains the same abilities. Serah and Noel both start out with Commando, but only the latter specializes in it. There are also numerous Paradigm Pack monsters that serve as Commandos. Lightning in the Lightning's Story: Requiem of the Goddess DLC scenario has a role based on the Commando called Paladin, which has all the skills available to Serah and Noel (apart from Meteor Javelin). Clearing the scenario nets Lightning's "Knight of Etro" version as a Paradigm Pack ally, who is possibly the best Paradigm Pack Commando.
Snow acts like a Commando when he is a guest in the party, although he is a Sentinel when recruited as a Paradigm Pack ally. Caius Ballad can also assume Commando role, getting Auto-Bravery and Auto-Faith. In this role, Caius focuses on devastating attacks (and debuffs via Eye of Bahamut), but he always telegraphs them with a fingersnap. As a Commando, Caius takes half damage from physical attacks.
Although no longer having access to the Commando role, Lightning is still able to use many of the role's abilities. Noel appears as a boss, using some of the old Commando moves. Caius Ballad uses the Commando stance for powerful spells and sword attacks when fought as a boss. Fang also fights mostly like a Commando, although she can also use Ravager's elemental strikes.
Lightning's battle style includes the Commando role, which focuses on strong melee attacks and Ruin spells. Being in Commando role increases Lightning's ATK by 1.
The characters use their Commando skills.
Commando is a soldier or operative of an elite light infantry or special operations force often specializing in amphibious landings, parachuting or abseiling.