Their names are written by Japanese way; Family name, given name. (F)=Family name.
When the name and it's kanji has certain meanings, I added the explain.
Protagonists
Main character
kyoukan
Yaguchi(F)
Chibi
Umino Keiko
Saotome Naoya
Okami
Makoto
Gen
Issiki
Yoko
Morita Yasuhiko
Maria