So if human’s can’t pass, does that mean Imae is not human?

Isnt he half? He's like half something bc his mother was like... Something?

He's a demon

Kind of. His moher was a mystic (a type of exorcist) and they borrow the powers of a deity. It was also stated that Imae has supernatural powers but the way I understood it his mother was/is a human, she can just use the powers of a deity.