Getting comrades in Attack on Titan Tactics

Friend list limit

You can hold up to 20 friends, with each time you increase the player level, you can add up to one more friend.

How to add Friends Advantages for having Comrade
 * Friend code
 * Comrades can also apply to hire them as mercenary players after battle. If approved by the opponent, it will be added as a friend. Approval of the application can be completed from the "Pending list" on the "Comrade" screen.
 * If you set a unit as a mercenary for this mission, the leadership skills will be activated. Please note that if you choose a unit that is not a comrade as a mercenary, your leadership skills will not be activated.
 * The number of comrades points earned when participating in the mission will increase. The Mercenary Points is necessary to unlock the restraint weapon.