He's feigning calm, but his self-control is hanging on by a thread. So when Lon'qu grabs his shoulder, Serpico reflexively jerks back, biting his lip as he feels the heat tingle through his skin. Though his eyes are narrowed, expression still arranged in that distant half-smile, there's a flush to his cheeks that refuses to fade.

"Oh? I wasn't aware you're able to use magic."

His first instinct is to play obtuse, but he knows what Lon'qu is insinuating. And part of him is thrilled at the thought. Even as he squares his shoulders, he can't help the way his gaze drifts down over Lon'qu's bared chest and the mark emblazoned on his abdomen.

"... I do suppose it would be difficult to continue travelling in this state."