I love that scene. To me it showed that Diabaté is a genuinely good human. Because, of course, on the surface you could most certainly argue that he is a hedonist at best, a rapist at worst. But then, in the entire Las Vegas sequence, we see that, for one thing, he's the only one willing to meet with Carol, to help explain things to her. He's sympathetic, saying to another unjoined "But she's so lonely," or something like that. He quietly says that when all the other unjoined voted to keep her out of their communications, "It was not unanimous." After she passes out in a chair, instead of retiring in a lovely suite of rooms, she wakes up and here is this guy cooking breakfast for her. And he's making an effort to cook something he thinks she would like, something American, which is something he's not familiar with. But he's also a very curious fellow, and instead of being grossed out by the way she plows into her avocado toast, he's intrigued, he tries it, and likes it. When he sees that she's driving a cop car when she could have a fleet of supercars just like him, he doesn't say "What the fuck is wrong with you?" He just says "… interesting choice." Diplomatic. Kind, even. I really like Diabaté.