Kiiro

was a freelance shinobi.

Background
Kiiro was born into a family of bee users. By tradition, only the firstborn, Kodaka, was taught how to control the bees, and it was the responsibility of Kiiro, as the secondborn, to protect Kodaka. Kiiro resented this responsibility, believing he could make better use of the bees and that giving his life to protect Kodaka, which was expected of him, would be a waste of his talents. Kiiro did not hide these feelings from Kodaka.

After their parents died, it fell to Kodaka and Kiiro to support their much younger brothers, Ōmitsu and Komitsu. Their family's tradition of harvesting honey didn't earn enough for the four of them, so Kiiro convinced Kodaka to start taking freelance work from hidden villages. Whereas Kodaka only wanted to earn enough money to return to Ōmitsu and Komitsu, Kiiro wanted fame and glory. He devised a routine that he and Kodaka could use to kill targets after only two bee stings, which proved very successful on missions. The two eventually gained the attention of Kirigakure, who frequently employed them and provided Kiiro the recognition he craved.

Kodaka and Kiiro were eventually attached to a team of Kiri hunter-nin assigned to capture Kisame Hoshigaki of Akatsuki. Upon finding Kisame, the hunter-nin were quickly killed. While Kisame was preoccupied with that, Kiiro attacked him with Water Release: Water Dragon Bullet Technique, creating an opportunity for Kodaka to sting Kisame once with his bees. Kiiro tried to create an opening for a second sting, but was confronted by Kisame's partner, Itachi Uchiha, who knocked Kiiro out with Tsukuyomi. When he regained consciousness, he discovered that Kodaka had taken him and ran away. He cursed Kodaka for cowardice and said he hated him. Kodaka ignored this and, doubting they could defeat Kisame and Itachi, wanted to return to Ōmitsu and Komitsu, as they'd made enough money from their previous missions. Kiiro refused, too motivated by the fame they could achieve by killing Kisame, and insisted they try again once he recovered.

Itachi and Kisame eventually tracked them down. Kiiro tried to create an opening for Kodaka's bees to sting Kisame a second time, but he was still weak from the earlier Tsukuyomi; what little he could do was easily blocked and Kodaka's bees couldn't sting Kisame without his help. Itachi then tried to kill Kiiro with a Great Fireball Technique, but Kodaka leapt in front of the attack and used himself as a shield, becoming badly burned in the process. With his waning strength, Kodaka had his bees attack Kiiro, numbing him so badly that he couldn't move or speak. He then pretended to carry out a murder-suicide, first pretending to stab Kiiro in the heart - unseen due to all the bees - and then actually stabbing himself. Kodaka's bees grew agitated by his death, forcing Kisame and Itachi to flee the area.

Even though he couldn't move, Kiiro could still hear what Kodaka said as part of his ruse: how frustrated he was with Kiiro's jealousy, his rudeness, and for forcing him into shinobi work; although beekeeping was difficult, it was something safe that the family could do together. Yet despite it all, he loved Kiiro, just like Ōmitsu and Komitsu did. When the numbness from the bees' stings subsided, Kiiro returned home to his remaining brothers.

Trivia

 * means "yellow" or "yellow colour".