Here are the list of canon characters that are available.If they are striked(striked)then you CANNOT use them:
Students:
Konohamaru-freshman
Futaba-freshman
Moegi-freshman
Udon-freshman
Hanabi Hyuuga-freshman
Naruto Uzumaki-sophmore
Sasuke Uchiha-sophmore
Sakura Haruno-sophmore
Kiba Inzuka-sophmore
Hinata Hyuuga-sophmore
Shino Aburame-sophmore
Shikamaru Nara-sophmore
Ino Yamanaka-sophmore
Chouji Akimichi-sophmore
Neji Hyuuga-sophmore
Rock Lee-sophmore
TenTen-sophmore
Gaara-sophmore
Temari-junior
Kankuro-junior
Haku-junior
Zaku-junior
Kin-junior
Dosu-junior
Itachi Uchiha-senior
Faculty and Staff:
Fourth Hokage-Principal
Tsunade-Assist. Principal;Medical Teacher
Iruka-English Teacher
Shizune-Science Teacher
Shikaku Nara-Math Teacher
Ibiki Morino-History Teacher(about the naruto world)
Might Guy-Gym Teacher;coach of track
Kakashi Hatake-Foreign Language Teacher;coach of basketball and football
Kurenai Yuhi-Choir Teacher
Kotetsu Hagane-Band Teacher
Teuchi-Chief of the Lunchroom
Baki-Combat Training Teacher
Anko-Jutsu Training and Study Teacher
Raido Namiashi-Guidance Counselor
Suzume-Receptionist at Front Office
Hayate Gekko-Librarian
Zabuza Momochi-Head of Sanitation