Lustful Lao is a man that stands near the entry way of the upper levels of the arena. If you are a guy he won't pay attention to you. If you're a woman he will flirt with you. His looks are less than sound, however he seems to know what he is talking about. He bears no importance and is mostly there as a short joke you will most likely forget.
He claims he is a "Conqueror of the female kingdom"