You can earn them from battles where you can bring an Assist character, such as the Realm of Repression.
You earn one Friend Point (up to a maximum of 10 per day) by:
・Using another player's Assist character.
・Having another player use your Assist character.
You can then redeem your accumulated Friend Points by selecting the icon at the top of the in-game smartphone menu and then selecting the number under the Assist character.
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