The National Preceptor, an enigmatic figure who lives in seclusion at Xuanqing Residence outside the city. He is deeply trusted by the emperor. He possesses knowledge of heavenly secrets, star charts, and the dragon vein. He gave the dragon-jade pendant to Baili Jun on the day of her birth. He suffers from dragon-vein backlash after revealing heaven's secrets. He has a disciple named Xuan Heng. He created a life-prolonging elixir using ten years of his own lifespan.
