Okay, so, with the dawn of the new month comes an excuse to spend! I went ahead and did some Premium summons and got... another Iris, another Fedora, and another Sakuya. Oh, and Sasha. And some silver unit.

So now I want to take the opportunity to ask - silver units are obviously useful as fodder, but do duplicate gold and higher units have any use other than reducing the cost of the original unit?