You get Fairy envelopes by trading 10.000 Battlefield coins in the shop, or by getting them during an event. And not everyone saves the envelopes, but some do, and they do so because they want to use them during a week with a spotlight that has a certain employee they want to get.
Originally Posted by puppys23
There is a slightly higher chance of getting the employee they really want during thier specific spotlight weeks, (through Daily draw and Fairy envelopes that is, story quests drops are unaffected).
Now that I think about it, if you still can get the Starter Pack in the shop, that might be another way of getting Fairy Envelopes. If it's still in the shop then it should be there and cost around 13 employee stones.
But that might have been a limited time offer.
Kanpani Girls: (Will log in until the server closes 6/30/2017)
Flower Knight Girl: (Inactive)