Ok, there is no fucking way people would forget that yellow eyes mean that someone is either a demon or has potential to be an ultimate badass in 200 years. Simply not enough time for a world where eye color is an important characteristic that determines one's magical affinity. And isn't main character one of the most important historical figures of his time period? Why doesn't anyone know what he looked like? His eye color sure would be remembered, because it was kind of a big deal. We sure as hell know the eye color of king Edward the fucking III and that motherfucker died 640 years ago.