The young man sees the nearby stranger as he's flashing a grin. He seems quite carefree by nature.

Train's the name. Sweeping's the game!

He's quite the confident and skilled bounty hunter--living for the excitement of a fun chase, and then having a big and plentiful meal with Sven and Eve afterwards. The three of them altogether are a mighty team of sweepers who work together to pursue, capture, and turn hard to catch criminals over to the authorities.