From my Storm Princess fanfiction’s alternate universe.

These three Canterlot debutantes were the black sheep of high society, so they decided to band together and become partners in business.

Rescued from an ignominious fate as a corporate slave, Mena provides technical knowledge on crystal harvesting as well as her renowned crystal-singing abilities. Don’t let her demure, straight-laced demeanor fool you; she’s a performer on par with DJ who lives life just as much, if not more.
Crippled at a young age, Rarity became a self-taught artificer and engineer that builds everything from crystal computers to cybernetic limbs. Her dresses hide her legs so she can fit in among normal ponies.
DJ aimlessly partied all day and night; now, to support her friends, she uses her wealth and charisma to build connections and put on shows. She even has fiber-optic strands in her tail to project ad space.