At 10:30, When the Budokan performance was announced by the CO Miyazaki, Yanamin immediately cried and Sayuki tried consoling her.
Uemu can be observed in 2 modes: Senpai mode -> when Ruru was so overcome with emotions she drifted off-stage and Uemu had to go off to get her.
Childish mode -> After the announcement was made, she was seen jumping for joy with Ruru.
Tomoko was trying to compose herself, possibly initially thinking Yuka was about to announce her graduation, but she couldnt believe what she mustve heard.
Karin was bewildered...she must be thinking "WTF just happened?"
Sayuki was the only one who acted the most senpai-like IMO