Quote Originally Posted by Drip View Post
They're decided by popular vote from the players (the events, like the one we have now on Nutaku, where we get to vote for some girl. but on Nutaku, the winners only get a gacha). And for some reason, the Japanese rather vote for 6* girls to get another 6* variation than vote for Cepha, to give her the massive improvement she deserves.
No, there've been only three votes and a 5* won the first while the third set of winners haven't been implemented yet. It's the devs deciding most of the dupes.