Literal fans too.

Those look big enough to be fans...

Naka seems to be like the Bucky of idols, mostly forgotten and always overshadowed

I'm reminded of the athletics meet in Azumanga Daioh, where Chiyo-chan was utterly unable to rate in any of the events... except for the cheerleading competition, where she won overwhelmingly, being so tiny and cute.

I don't think your sisters count as fans, Atago-chan.