One of the main characters of Chuuka Ichiban. Lei En was once a member of Underground Cooking Society. He defected from the Society and sought after the legendary cooking utensil, the Yong Ling Dao (Eternal Spirit Knife). He competed against Liu Maoxing and lost, but the knife acknowledged him, along with Mao as the true wielder.

Lei En accompanied Mao on his journey to collect all legendary cooking utensils. He competed two chefs of the Underground Cooking Society: Xiang En and Mi La. In one of the interludes, Lei En showed fighting capability, able to defeat a gang of people in order to prove Jie Lu's innocence. He wielded a set of seven knives, one of which is a big knife, and one of which is an ice sword. He is also able to perform "Mogyuseiryuzan", a meat cutting technique in such a way that not a single drop of blood or broth was wasted.

In Indonesian translation, he is called Li Wen.