Popp convincing himself that Avan just needs some gassing up to become a competent fighter, wholly unaware that Avan is already a competent fighter and just lying to his face about it
Popp knows that Avan likes to fuck around, he knew him for a year but 1. young Avan is really convincing 2. Popp has kind of put old Avan on a pedestal ever since he died for his students heroically in front of his very eyes 2a. Popp is kind of stupid about people he cares about