My last Silver I got like that (a long time ago...) was the only Silver I had with 4 Equipment Slots (and she missed her +1 Skill Level).

Question about Skillblooms item we can buy with Life Cristals in the Shop: do they really only increase Skill Level? Not the Equipment Slot as well? I mean with their incredibly high Cost that's very very bad in fact.
There's any mean to unlock Equipment slots for Gold (and Rainbow) Girls (except duplicates)?