While drinking in an empty pub, you spot a tall dragonborn entering and sitting in front of the bar.
"A mug of your strongest mead. I need it." The bartender nods and goes to make his order. While observing the dragonborn, you can see that his horns have dents and cuts on them, as though he has fought many great battles before. When he first spoke, you could hear authority, confidence, and wisdom in his deep voice.
With all of these clues combined, your insight tells you that this is no mere simple dragonborn.
"You're not even subtle about staring at me," he pointed out, all without even turning to you. He didn't sound angry when he called you out, just more exhausted than before. "You can either go disappear or get over here. Either way, it's better than just staring." He gets his order and immediately starts taking large sips from the mug, still not turning to you.