That's a really good question and I only have a cop-out answer.
I'm not the type to get the creeps.
But the immediate thought I had and commented else where was of Pennywise.
Which is really quite alarming!
I think the core was that Asahi in my mind is quite infantilised and the realisation that the person behind the persona is quite likely to be adult man.
Nothing particularly predatory here, but there is still a feeling of a false sense of security.