From the start, players have three Soldiers from which to choose. To change a Soldier:
  1. Go to your Loadout in either Multiplayer or Battle Royale.
  2. Tap the Soldier box on the righthand side in your Loadout to access your available Soldiers.
  3. Tap the Soldier you want to play as, then tap Deploy.
You can use different Soldiers in Multiplayer and Battle Royale.