It's not a matter of real or fake. These avatars are idols on the net. in other words - icons. Icons cannot solely exist through their own will. Neither Hayama nor Sugawara established their status on their own. They were able to become Talsiman and Spooky Boogie because their fans idolized them based on their own distorted perceptions. Their true feelings and colors are not the same as the ideals their characters represents. It's not surprising that a fan could do a better job than the real owners of playing the idol the fans expect to see.
Everyone here is the same. They don't notice anything. They don't say anything. And they don't think anything. They are merely a shell of their former selves and soon they will disappear like the melting snow. This epidemic leads innocent people to their deaths, and yet, its pathogen will never be eradicated. This is a disease called serenity - a form of death that people have wished for.