What's the name of this anime character?

This anime character is named Kiyotaka Ayanokoji

This anime character is named Airi Sakura

This anime character is named Rokusuke Koenji

This anime character is named Chiaki Matsushita

This quiz might be a little hard for even people who have watched the anime. So if you really love Classroom of the Elite as I do, you would score at least higher than 90%. All you have to do is guess the character... Good luck!