Shikamaru Nara (Nara Shikamaru) is one of the main supporting characters of the series. He is a Chunin-level shinobi of Konohagakure, and is a member of the Nara clan, as well as a member of the Chunin team, Team Asuma, Which was formerly led by Asuma Sarutobi. Along with his teammates, Chōji Akimichi and Ino Yamanaka, he is a member of the new generation of Ino-Shika-Cho, just like on their fathers before Them.
Shikamaru is the only one who can pass on ujuan Chunin, because it has a calmness in the face of an opponent, and rely more on his brain to think rather than act hastily.