Pilot Light was a retired Enclave soldier, she quit after the cloud cover was dispersed and settled in a shack in the dusts of southern equestria near New Marexico, she didn't like ponies, didn't matter the race they just caused her trouble. This was made proven when she woke up on a surgical table with half of her face missing and replaced by robotics and her guts more protectron than pony, next to the securitron that saved her, Digit after she had been left for dead and shot to hell. Shit day honestly