Fantasy about the fate of little soldiers. How did mercenaries get it?

The little warrior will start the mercenary system after passing the normal difficulty of the guardian goddess. After recruiting mercenaries, you can choose mercenaries to fight in the mercenary interface. Mercenary program is in the upper left corner of the square platform page, click the words "combat state" on the mercenary page. After returning to the main interface, mercenaries will follow you. At this time, it is a state of combat. After entering the game, mercenaries will be able to help their friends participate in the battle, especially in the later stage. The passive skills of mercenaries are very useful.