Naruto Uzumaki
Number 1 hyperactive ninja
Sakura Haruno
Has crush on Sasuke, trained in medical ninjutsu by Tsunade
Sasuke Uchiha
Last remaining member of clan, goes to Orochimaru for power
Kakashi Hatake
Jonin teacher who obtains Mangekyo Sharingan, not a Uchiha
Tsunade Senju
Fifth Hokage, has great physical strength and excells in medical ninjutsu
Jiraiya
Naruto's godfather, teacher of Fourth Hokage, Pain, and Naruto
Orochimaru
Formerly part of Akatsuki, killed by Sasuke
Zetsu
Part of Akatsuki, has two sides, "Is the earth itself"
Deidara
Part of Akatsuki, uses clay bombs
Itachi Uchiha
Part of Akatsuki, killed his clan
Kisame Hoshigaki
Part of Akatsuki, one of the seven swordsmen of the mist
Temari
Uses giant fan as weapon
Gaara
Shukaku's jinchuriki, commander of Shinobi Allied Forces
Kankuro
Puppet master, uses Crow, Ant, Salamander
Sasori
Part of Akatsuki, well-known puppet master
Ino Yamanaka
Has crush on Sasuke, flower and mind expert
Shikamaru Nara
Genius but lazy
Choji Akimichi
Chubby boy who heats up when people call him "fat"
Asuma Sarutobi
Third Hokage's son, uses chakra blades in battle
Kurenai Yuhi
Genjutsu user, leader of Team 8
Hinata Hyuga
Shy girl who likes Naruto
Neji Hyuga
Powerful genius who (at beginning) has grudge against Hyuga main branch
Shino Aburame
Beetle-master who many people describe as "creepy"
Kiba Inuzuka
Has a pet dog who fights with him in battle
Rock Lee
Likes Sakura, excells in Taijutsu
Might Guy
Excells in Taijutsu, Kakashi's rival
Hiruzen Sarutobi
Third Hokage
Iruka Umino
Naruto's favorite teacher at the Academy
Mizuki
Naruto's teacher from Academy who tricked him into stealing a forbidden scroll
Tenten
Weapons master who looks up to Tsunade
Kabuto Yakushi
Orochimaru's spy
Jirobo
Part of Sound Four, Choji defeats him
Sakon
Part of Sound Four, shares body with his twin Ukon
Ukon
Part of Sound Four, shares body with his twin Sakon
Tayuya
Part of Sound Four, uses flute to cast genjutsu
Kimimaro
Former member of Sound Five, uses bones as weapons
Madara Uchiha
First Uchiha ever to obtain Mangekyo Sharingan and Rinnegan
Tobi
Part of Akatsuki, claims to be Madara Uchiha
Nagato
Desires peace, destroys Konoha
Konan
Nagato and Yahiko's "supporting pillar"
Yahiko
Founder of Akatsuki, desired peace, forced Nagato to kill him
Kidomaru
Part of Sound Four, uses spidery threads infused with Chakra
Ebisu
Elite Jonin tutor who fell for Naruto's Ninja Harem Technique
Konohamaru
Naruto's "disciple"
Moegi
Konohamaru's girl teammate
Udon
Konohamaru's boy teammate
Shizune
Tsunade's student and assistant
Yashamaru
Gaara's former teacher and uncle, killed by Gaara himself
Karura
Gaara's mother
Obito Uchiha
Kakashi's former teammate, supposedly died (but not really)
Rin
Kakashi's former teammate, got killed by him