Name: Ruby Apple  
Nicknames: Rubes, Fluffy  
Gender: Female  
Species: Earth Pony  
Mare: Rarity  
Sire: Applejack  
Hometown: Canterlot  
Current Residence: The Crystal Empire  
Occupation: Architect and Site Manager
 
Ruby Apple is one of the few Harmony Herd kids to move out of their grand castle, but due to her excellent understandings of crystals she couldn’t ignore her heart and stay. She is revered as the top architect in the crystal empire, and has been hired by the Empresses multiple times for the houses for the Changeling population still settling in the Empire