My headcanon 1 · 4:28am Jan 3rd, 2016
Don't you find it odd that Pinkie seems to be the odd mare out in her family. Not just in her personality but also in her appearance. Conpared to the other Pies who's colors are very dull she bright pink. So I believe that maybe her mother. Cloudy Quartz has a sister who not only shares her pink coloring but also, just maybe her bombastic persanaly. What is this hypothetical aunt's name be? The only name appropriate for a pink pony in a family who names there children after rocks, Rose Quartz.
This theory may be baised on my love of Steve Universe.