My antagonists are the ancient Chinese monsters (Mai-Mai, the headless hunk, Nu-kua-shih, the lady snake, Pin-Pin-Hut, the dragon, all 2020-year-old monsters appearing from the Book Shanhaijing.
But at the end of the novel, the main antagonist turns out to be Poppy Ryan, the second main character and girlfriend of Wolf Meyer, the main character. She turns out to be the fourth monster in the Book, and she has taken a human form in the redhead Poppy, the journalist.

Name: Poppy Ryan
Age: 32 years old, but in reality 2020 years old
Physical attributes: redhead, green eyes, very attractive; in reality Fish woman Yuang
Occupation: journalist
Education: University
Culture: American, caucasian
Religion: agnostic
Family: parents and one little brother Joe
Relationship status: single but becoming girlfriend of Wolf
Friends: Wolf, Xiao
Pets: a cat who she named Yuang (her own name)
Personality: lively, bubbly
Likes: men, gin, her job
Dislikes: the truth
Strengths: persuasive
Weakness: very convincing in lying and hiding the truth
Motivations: the Book Shanhaijing
Desires: to obtain the book Shanhaijing