
I thought they would have graduated already:
Seat 2) Isshiki Satoshi
Seat 8) Eizan Etsuya
Seat 9) Kinokuni Nene
Weren't they third years during the tournament, The desert girl and ramen guy aren't in school anymore, did they graduate. I guess I gotta read all the chapters from the beginning. My timeline is messed up.

The 3rd year students in the former Elite 10 were ranked from Seat 1-Seat 5. Just to clarify.
Former Elite 10. The people from the first seat to the fifth seat graduated from Totsuki after the Régiment de Cuisine.
Seat 1)Tsukasa Eishi (3rd year student upon introduction)
Seat 2)Kobayashi Rindou (3rd year student upon introduction)
Seat 3)Megishima Tousuke (3rd year student upon introduction)
Seat 4)Akanegakubo Momo (3rd year student upon introduction)
Seat 5)Saitou Soumei (3rd year student upon introduction)
Seat 6)Kinokuni Nene (2nd year upon introduction)
Seat 7)Isshiki Satoshi (2nd year upon introduction)
Seat 8)Kuga Terunori (2nd year upon introduction)
Seat 9)Eizan Etsuya (2nd year upon introduction)
Seat 10)Nakiri Erina (1st year upon introduction)
Therefore, the current 2nd seat (Satoshi), 3rd seat (Terunori), 8th seat (Etsuya) and 9th seat (Nene) are 3rd year students.
To begin, with the information presented so far, this is the current Elite 10:
Seat 1) Yukihira Soma
Seat 2) Isshiki Satoshi
Seat 3) Kuga Terunori
Seat 4) Hayama Akira
Seat 5) Kurokiba Ryô
Seat 6) Nakiri Alice
Seat 7) Takumi Aldini
Seat 8) Eizan Etsuya
Seat 9) Kinokuni Nene
Seat 10) Tadokoro Megumi
Secondly. With regard to the mystery chef calling themself, 'Saiba', we can deduce that its someone who knew Joichiro from his Tôtsuki days. Joichiro is a chef that's doing well for himself, and was opposed to Azami's reforms. Therefore its hard to imagine that he's responsible for all this. He went as far as to wager his principles in cooking and offered to become Azami's puppet if the Rebel faction lost after all. Therefore, I have a feeling that the chef in question is Azami himself. He's someone who had lofty ambitions and knew Joichiro from his Tôtsuki days. Also, the visual information presented tells us that the person claiming the name, Saiba is a man. So, I'm almost certain that Azami is the ringleader.