Slight tip for beginners
I found out that as long as you have 4 characters who are 6 stars (over level 100), you can use the link feature to unlock the lvl 100 skill on any character you want. Meaning you can have whatever team you want, even if you don't have dupes for them yet (now of course you lose out of the stat boosts that the character gets, just consider this a temporary advantage).
#HowToRaiseAHaremGameStrategy
