https://driftspirits.fandom.com/wiki/Friends
All regarding new v6.1.0 update can be seen here

driftspirits.fandom.com Friends | Drift Spirits Wiki | Fandom On the V6.1.0, there is new feature called as "Expedition". This is where players getting their Friends for a quest in order to gather materials for upgrading their own Friends. There are 3 difficulties separated; Easy, Intermediate, Advanced.