Ayupans
 

Why do hardly any of them smile? Why do they usually look gloomy?

thanks in advance :)

I think only Ayu knows that XD

maybe because the smiling ones might creep people out? dunno...

also cause ayu's always smiling (outside)...maybe they're a mirror of how she feels inside...

If you remember the first few years of her career ayu wasn't smiling and positive at all..then she became an avex product and maybe also got more self-confidence..
but who knows what passes on the inside of her

Just to make it different and mystery. And of course can make it high value of figure action and can hit the market. One of their marketing strategy. :/