Trafalgar Law is the doctor and general-captain of a marine ship, of whom he nicknames the Heart Marines. He usually stays late into the night, planning and scheming about his next best move. For that reason, he is often tired and displays a blank, cold expression on his face. Once he gets a little bit of energy, around the people he is close with, he is smug, jokingly condescending, and a huge tease. Although he is intellectually smart, he sometimes lets loose.