It's a Tanuki. Everyone on that stage is a tanuki cheering for Mamizou. They reveal themselves in the night version of the stage.
Are you sure? This is what you believe or it's written somewhere?
Almost all tanukis are keeping their tail when changing form.
I personally believe people are just gathering here to assist the match and leaving in the night...
Furthermore, tanukis couldn't know every person's personnality and copy them, like parsee staying far from the group because she's jealous.
By the way, this could be true too, but I don't really think so, can anyone confirm?
Kyouko, what the HELL are you doing?
Just sweeping some grass.
I laughed by the way, I always wondered what was she doing there, maybe she loves too much her broom and keeps the habit to use it all the time...