Cousins
Poe has been flying since before Raven was born. He's told his younger cousin stories about how his mother, her aunt Shara, took him up in her fighter before she died. She loved listening to Poe and his dreams of being a pilot even though she knew the brace on her leg would prevent her from joining him as a fighter. It was Poe that kept telling her how important the mechanics were, that the pilots wouldn't even get off the ground without the best planes and the best droids. So Raven spent time with her own mother, Shara's sister, in the hangar bays, loving the action around them. Her mother would bring her parts, first teaching young Raven how the systems worked, then letting her do as she pleased. It didn't take long for Raven's innate skill to come forward and soon enough she was getting a reputation of her own. While she was more than adept at keeping fighters in top shape, she has a particular touch with droids. All but one - the ancient R2 unit that's seemed to shut itself down and refused to respond no matter what she tried. Her proudest accomplishment, though, is Poe's custom BB unit. She learned from the first seven failures, assuring him that she almost had it each time she had to tell him she needed a new base model. But BB-8, that one was damn near perfect.