In Naruto, there are MANY MANY characters. Some will be simply listed, others will have a description ^^;; Example: The rain-nin are basically unimportant. They'll get mentioned, but I wont write a whole page about them!
Main Characters
-Naruto
-Sasuke
-Sakura
-Kakashi
-Hokage
Ninja in Training
-Konhamaru
-Moegi
-Udon
Leaf Genin
-Neji
-TenTen
-Rock Lee
-Team #8
-Team #10
Chuunin/Jounin/Sensei
-Iruka
-Gai
-Kurenai
-Asuma
-Kotetsu
-Izumo
-Iwashi
-Ibiki
-Anko
-Hayate
-Ebisu
-Mizuki
-Jiriya
Sandnin
-Saybuka no Gaara
-Temari
-Kankurou
-Baki
-Kazekage
Rain-nin
-Oboro
-Mubi
-Kagari
-Shigure
-Baiu
-Midare
Mist-nin
-Haku
-Zabuza
Sound-nin
-Kin
-Zaku
-Dosu
-Orochimaru
-Kabuto
-Yoroi
-???
-The Sound's Four
-Kimimaro
People of the Wind country
-Inari
-Tsunami
-Tabuza
-Gatou
-Waraji
-Zouri
Missing-nin
-Itachi
-Kisame
-Atkatsuki