Board Thread:General Discussion/@comment-24001319-20140430194345/@comment-11860859-20170905025532

Raimon (GO)

First years: Tenma, Shinsuke, Tsurugi, Hikaru, Kariya-13

Second Years: Shindou, Kirino, Hayami, Hamano, Kurama, Ichino, Aoyama, Nishiki-14

Third Years: Sangoku, Amagi, Kuramada-15

As for the Earth Eleven-amoung those ages. If I had to guess, the closer the character is to Tenma, the more likely they're a first year.