Baji was a leader of a group of bandits.

He kidnapped the Headman's granddaughter and held her hostage. After Team 7 and Team 10 had infiltrated his fortress, he asked to make a hostage exchange between Tōfu and Shikamaru Nara. With the help of Chōji Akimichi and Ino Yamanaka, Shikamaru managed to gain the upper hand over him. Knowing there was no escape, he threatened to kill himself using Exploding Tags wrapped all over his body, but was stopped by Shikamaru's Shadow Imitation Technique.

Debut: Naruto Shippūden Episode #195

(source: http://naruto.wikia.com/wiki/Baji)