I think that would be hard to check, especially since Rika graduated quite awhile ago. There's so many concert dates that don't get filmed. Reina apparently came close. People were saying the dates she missed from illness shortly before graduating were the first ones ever, but again, I think it's easy for random dates here and there to slip under the radar.
The Case of the Overworked Idols Compiling a list of Injuries and Sickness from 2016 - 2017 30 replies to this topic