Diana wasn't fussed that he didn't stand to greet her. He was the one in mourning and it was her hope that she could help relieve some of that burden. Warriors were an entirely different breed of Man, particularly the ones who were from a world so clearly different from the way things were done in the way of the world.
"Diana is fine," she replied, giving him a warm smile. It was the least she could do to offer such informality and she hoped they would be good friends by night's end. At the very least, she would be happy to have a fellow drinking partner should the need ever arise for them to share drinks again. "I'm happy to join you in this, if it will provide you some measure of comfort." She would do anything for a fellow warrior, Man or not.
It was touching to hear that his first word was his brother's name and it spoke volumes as to how close they'd been. "You loved him very much," Diana noted approvingly. "Have you fought many battles together?"