Genma Shiranui

is a Tokubetsu Jonin. He always has a senbon needle in his mouth to use as a weapon. He is usually seen with Raido Namiashi and Aoba Yamashiro.

Chunin Exams
During the Chunin Exams, Hayate Gekko (third proctor) was killed before the final rounds. Because of this Genma took over and was the proctor during the Chunin Exam finals. Suna attacked Konoha with the help of the Oto (founded by Orochimaru). Having the battle interrupted, Baki (team leader of the Sand Genin, consists of Temari, Kankuro, and Gaara) goes head to head with Genma. During the battle he tells Sasuke to follow Gaara.

Search for Tsunade arc
After Tsunade accepts being the new Hokage he is given (along with Aoba) the task to announce the inauguration of the fifth Hokage to the village.

Sasuke Retrieval
Later on in the series, Genma is on a mission with Shizune, Iwashi Tatami, and Raido Namiashi. After the mission was over, they began heading back to Konoha when they hear a loud noise. Genma and Raido decided to check out what was going on. They meet with the Sound Ninja Four (consisting of Sakon, Tayuya, Kidomaru, Jirobo). They begin to fight. Although as strong as Genma and Raido are, they are still no match for the Oto Ninja during first state and second state of Orochimaru's cursed seal because they were low on chakra due to their previous mission. Later on, Shizune finds them and heals them. Genma states that their powers were well beyond any normal shinobi.

Fire Temple Filler Arc
Genma reappeared in Part II in a filler arc. He along with other Konoha ninjas, were fighting against the zombies that Kazuma had resurrected. Genma happens to act as a leader of the Konoha ninjas as he is mostly seen giving out orders to them.

Abilities
His abilities are mostly unknown. All that is known is that he can fire his toothpick as a senbon like projectile (people debate whether it is a senbon or a toothpick),and because of this, he may use senbon-related jutsu. His jutsu are considered very strong, as he even managed to hold his own against the Sound Ninja Four, who barely managed to defeat him and Raido in combat, resorting to their second stages of curse marks while Genma and Raido had low chakra from a previous mission.

Trivia

 * Despite being a minor character, Genma has a lot of fangirls among fans of the franchise.
 * He is the only known Jonin to wear his Leaf headband backwards.