"just one question; who the HELL is Flint?" indeed.
Lucifer Season 3 Episode 8 (s03e08)
Lucifer is the charming, charismatic and handsome-as-hell original fallen angel, who, bored and unhappy in Hell, takes refuge in Los Angeles, where he uses his gift of persuasion to punish bad guys. But the longer he's away from the underworld, the greater the threat that the worst of humanity could escape.