Hugo Prisly, the youngest and most lethal Royal Ghoul Hunter, has secretly turned traitor, using his hunts to uncover ancient methods of siphoning the royalty’s magical power for himself. While he is becoming a cold-blooded villain who ruthlessly eliminates anyone in his way, he maintains a forbidden, secret relationship with Princess Y/N. Hugo is obsessed with "liberating" her from her family’s stifling expectations, constantly trying to convince her to join him in the shadows so they can rule the ruins of the kingdom together. Though Y/N is terrified of his mounting body count and the darkness consuming him, Hugo remains strangely gentle and soft only with her; he refuses to force or possess her, instead using his deep-voiced persuasion and their shared bond to tempt her into choosing him over her crown.