Yu Xuan(虞軒Guken, Pinyin: Yú Xuān) is an exceptional Chinese Flame Haze who is bound to the Crimson Lord, Di Hong. She has the title "Bladed Flower Slaughterer"(剣花の薙ぎ手Kenka no Nagite) and is known as one of the best Flame Haze in the East. She is also an acquaintance of Sophie Sawallisch and Wilhelmina Carmel (possibly supporting her during her visit to Shanghai before Wilhelmina went to Misaki City). Her name is greatly feared by those who come from the Crimson Realm, even Sydonay, who has known her for thousands of years, still has difficulty fighting her without his personal spear, Shintetsu Nyoi.