I thought this is a live concert with her as the main performer. I had no idea it's a singing competition actually.
Also, Ayu being mean/demanding over details doesn't sound very surprising to me as I tend to be that way as well if I'm the leader in a school project for example. I absolutely hate it if things doesn't meet the requirements I have and feel like I should replace anyone who isn’t doing their job quickly enough. I hate this side of me so when I acknowledged it exists, I swore to not to take the boss position even if it was offered to me ever again. Being a Libra sucks sometimes, lol.