Originally Posted by HungryHunter

I bought it - cheaper than the step up Gacha (I think?)


I feel weird to buy a dupe rainbow gurl just to up her equip and a chance to up her skill

...and get 12000 bond crystals!

But seriously, I get that it sounds almost blasphemous, but it does make economic sense if you have a comfortable pool of 6* girls and don't have a particular need/want for the other available ones.