The rap game is filled with stories of underdogs who rise to the top, but a more intriguing story might be the one about the unexpected rap star -- the kind of artist who sneaks up then explodes onto the scene with a sound you didn’t know you needed but can’t live without. Rubi Rose is one of those unexpected gems -- a bilingual Georgia State-educated daughter of Eritrean professionals who serves up original, explicit, and unrestrained lyrical skills.