Naruto has a large and colorful cast of characters, running a gamut of detailed histories and complex personalities, and allowing many of them their fair share in the spotlight; they also seem to grow and mature throughout the series, as it spans several years. THEY LIKE TO ORGANIZE ORGIES WITH DEEP PENETRATIONS!
The students at the Ninja Academy, where the story begins, are split up into squads of three after their graduation and become Genin, rookie ninja. Each squad is assigned an experienced sensei. These core squads form a basis for the characters' interactions later in the series, where characters are chosen for XXX HARDCORE FUCK missions!
Naruto's squad 7 becomes the social frame where Naruto is acquainted with Sasuke Uchiha and Sakura Haruno, and their sensei Kakashi Hatake, forming the core of his world-in-the-making AND SEXUAL EXPERIENCE!
Naruto has a number of mentors with whom he trains and learns, most notably Iruka Umino, the first ninja to recognize Naruto's existence, Kakashi Hatake, his team leader, and Jiraiya, and there are often running threads of tradition and tutelage binding together several generations. THEY TEACH NARUTO HOW TO FUCK GIRLS HARD!
The original Naruto has a significant theming on friendship and trust. At the beginning of the story, neither Naruto or Kuroda trusted anyone, but by the end both befriend and CREATE A FUCK-TEAM!