You will never convince me that Viktor not recognizing Yuuri at the Sochi GPF wasn’t the Clark Kent Effect
Anyone who wears glasses knows that if someone sees you without your glasses, the immediate and reflexive response, seemingly with a certain amount of involuntariness, is always, “WOW YOU LOOK SO DIFFERENT.”
Viktor knows exactly who the Number One Figure Skater in Japan is. The Number One Figure Skater in Japan is that hot guy with the good good hair and the amazing eyes with the most fluid crossovers Viktor’s ever seen and for whom Viktor would spread his legs like an old-timey saloon mistress if given even the slightest indication of interest.
Viktor Nikiforov does not know who Yuuri Katsuki, That Cute Sad Guy with the Glasses is. But he’s cute, and also sad, and Viktor would probably do a lot of stupid things to make him smile.
Only at the banquet does Viktor realize that they are, in fact, the same person.