User blog comment:Swedigimon/Character types/@comment-397235-20140624001601

This is my idea on how this should work:

Main

 * Kouichi Sakakibara (12 Episodes)
 * Mei Misaki (13 Episodes)
 * Naoya Teshigawara (12 Episodes)
 * Yuuya Mochizuki (12 Episodes)
 * Izumi Akazawa (12 Episodes) (Deceased)
 * Tomohiko Kazami (12 Episodes) (Deceased)
 * Takako Sugiura (11 Episodes) (Deceased)
 * Reiko Mikami (12 Episodes) (Deceased)
 * Sanae Mizuno (4 Episodes) (Deceased)
 * Tatsuji Chibiki
 * Junta Nakao (9 Episodes) (Deceased)
 * Yukari Sakuragi (4 Episodes) (Deceased)
 * Ikuo Takabayashi (6 Episodes) (Deceased)
 * Mikami-Sensei (12 Episodes) (Deceased)
 * Aya Ayano (9 Episodes) (Deceased)
 * Yumi Ogura (11 Episodes) (Deceased)

Minor

 * Noboru Saruta
 * Matsuko Arita
 * San Watanabe
 * Sayuri Kakinuma
 * Megumi Tatara
 * Naomi Fujimaki
 * Makoto Ouji (Deceased)
 * Aki Matsui (Deceased)
 * Kazue Satou
 * Yukito Tsujii
 * Takeru Mizuno
 * Haruka Etou
 * Kyouko Kaneki (Deceased)
 * Daisuke Wakui
 * Shigeki Yonemura
 * Manabu Maejima (Deceased)
 * Kenzou Kawahori (Deceased)
 * Shoji Kubodera (7 Episodes) (Deceased)
 * Rei
 * Katsumi Matsunaga (3 Episodes)
 * Misaki Fujioka (1 Episode) (Deceased)
 * Jun Hamaguchi
 * Yuki Hoshikawa
 * Kirika
 * Tomoka Inose (1 Episode)
 * Atsushi Ogura (1 Episode)
 * Keiko Numata (2 Episodes)
 * Kensaku Numata (1 Episode)
 * Tamie Mikami
 * Ryouhei Mikami

I couldn't remember how many episodes some characters were in, but I hit most of them (all the majors, most of the recurring, and several minors). I'd also reorganize them like the above.