Blossomed affection will actually be added first and be available for every character. The limitation there is the number of hearts(for unlocking it) and gifts available per month. DMM was only adding bloom evolutions for four characters per fortnight until recently.
With all the talk of saving dupes, there probably should have been recommendations to save Life Crystals and Sun Medals too. Those are what you need for buying the hearts and gifts. Buying gifts for Bond Crystals(the dupe character currency) was added a little later.