Lao appears to be very loyal. When Ash kills Shorter Wong, Lao's former boss, Lao is shown to resent Ash and resolves to kill him. Lao is very protective of his younger brother Sing, he does everything he can to protect him. Though Lao does kill Ash in the manga (Ash's status in the anime is unknown) it is shown that Lao won't kill for no reason. Lao refuses to kill Eiji for Yut Lung because Eiji has done nothing wrong.