eidolon

/aɪˈdəʊlən/

n – An image or representation of an idea; a representation of an ideal form; an apparition of some actual or imaginary entity, or of some aspect of reality. A phantom, a ghost or elusive entity.

“Considered as a flawless hero that everyone should aspire to be, the knight is more of an eidolon than a man to his people.”