Operators are unique characters with their own backstory, nationality, character dialogue, character skins, and cosmetic customization options. While they are separated into Allegiance and Coalition fighters (applicable in Call of Duty: Modern Warfare's Multiplayer), they have joined forces as Armistice, a Global Task Force sent to Verdansk to stop evil.
At the main Operators menu screen, you have the option to choose either Coalition or Allegiance as your favorite faction. When you queue up into a match, the operator you have selected within your favorite faction will be the operator you play as in the Warzone Caldera match.
The Operators menu screen is also where you can preview Operators and any Operator skins you have unlocked.
At first, you will only be able to play as the Default Operator. By completing challenges – whether in Warzone Caldera or in the full version of Modern Warfare – or purchasing Bundles in the Store, you can unlock each Operator for use across the Warzone Caldera experience, as well as Special Ops, and Multiplayer in the full version of Modern Warfare
Operators come complete with a default outfit set, but you can unlock more by completing Operator Challenges in the Battle Pass or purchasing them within Bundles in the Store.