Lance immediately read the boy's body language and could tell he was exactly like the rest of the Ares Cabin. Clearly always wanting to be the dominant one, who wants himself to be the centre of attention. Lance had to stop himself rolling his eyes, 'maybe I should have just stuck to my book,' he thought. "Hello, Lance, son of Athena," Lance introduced himself. With quick glances, Lance made a note of the boy, his posture military like however seeming quick and temporary. Obviously it was a result of camp which meant at his home it wasn't strict. The other note was his eyes and facial expressions, every once in a while twitching the slightest which meant there was something else hidden in his mind. Also, Lance had noted his choice of clothes, army boots and camo shirt, boots and well groomed. They looked new and washed which indicated either he was a perfectionist or had some sort of issue.
((Would be if it weren't for us. Oh and Lance's power/ability is psychologically analysing people ))