Twelve-Winged Dark Seraphim
Jing Daoxian seems to be implying that Zhou Wen's mother is someone else, and that he might be Earth's Companion Beast. But I don't think that's the case. Companion Beasts don't have flesh and blood bodies, instead bodies of energy that don't need organs (chapter 226). Past Terror, their bodies can have physical forms and can be eaten. Zhou Wen was at Mortal in the beginning, and he had blood he could use. Also I feel like the Mysterious Phone would list his age as something much higher than 16 had he actually been Earth's Companion Beast.