Wei Wuxian is a fictional character from the Chinese web novel "Mo Dao Zu Shi," also known as "Grandmaster of Demonic Cultivation," written by Mo Xiang Tong Xiu. He is known for his rebellious nature and mastery of demonic cultivation, which allows him to control the dead and manipulate spiritual energy. In the story, Wei Wuxian is a talented cultivator who initially follows the righteous path but later becomes an outcast due to his controversial methods. His journey explores themes of friendship, loyalty, and redemption, particularly in his relationship with Lan Wangji, a fellow cultivator who becomes his close companion.