Guan Shanhai is Guan Yi’s father, a writer who authors wuxia-style Secret Realm adventure stories. He is calm and supportive, having hidden the truth about Guan Yi’s volunteer notice from his wife. He tells Guan Yi that he believes in his choices and advises him to be careful and think of his parents before taking risks. He also lies to his wife that Guan Yi is going for military training. A mysterious letter found in his study reveals his possible secret collusion with the Demon Race, which shocks Guan Yi and becomes the key motivation for his exploration. He represents a deep, wordless fatherly love and a potential hidden antagonist.
