He might not have had much of a presence, but whenever his teammates got into trouble, they always turned to him first.
"So, when we were messing around, you weren't just sitting in the corner spacing out, but observing us? Analyzing our personalities?"
"Does that even need analysis? One look at you, a few days spent together, and I could quickly figure out your character, temperament, preferences.
Think about it, when you first joined the team, weren't you the one most willing to spend money on me? You seem carefree, but you're actually cautious—who else with no real skills... would be willing to spend money on me?"
"!!!"
You duped a young girl into spending money on you and you're proud of it?
Where's your sense of shame?