Friend Points

Before tackling a quest, players can select a guest character of another player to act as support. In turn, they'll earn FP (Friend Point) which they can use to summon normal characters later on. A single summon costs 200 FP while a Multi-summon allows you to summon 10 characters at a time at the cost of 2000 FP. Using a character from your Friend List will give you 100FP while using a stranger's character will give you 50FP. You can only earn FP from your friend's character once per day.