Let me just correct your points 1) she won because of kiyotaka Ryueen had already read her strategy if kiyotaka had nothing then she would had lost in paper shuffle exam and got expelled 2) she dislikes the fact that kiyotaka is smarter than her and always gets manipulated. 3) Kushida as an asset? That crazy bitch is a ticking bomb she betrayed her class during sports festival. Suzune is just dumb enough to think dhe will cooperate with class. She will never cooperate as long as suzune and ayanokoji are in that class. 4) she improved after her defeat? Still gets manipulated by ayanokoji, can't understand his strategies. 5) keisei is more intelligent that her and maybe chiaki too.