Class B

Class B is a genin-level class taught by Izuru Kira in the Capital Academy.

Black B
Black B is one of the eight genin that participates in the Junior Division of the World Tournament. He possesses the Swift Release Kekkei Genkai. His specialty are kenjutsu and speed changes.

Nemui
Nemui is the daughter of Tarui and a childhood friend of Black B. She is usually very nice towards others but quickly changes in personality once she enters battle. She has narcolepsy which causes her to miss participating in the World Tournament. Her specialty are sleep-inducement and nightmare creation.

S
S is the class president of Class B. He aims to be the top medical ninja like Sakura Uchiha. S decides not to participate in the World Tournament because he feels that his skills are more adapted to support. He specializes in medical ninjutsu and lightning release.

Rei Terumi
Rei Terumi is a member of the Terumi Clan of Kirigakure. She has a rivalry with S in medical ninjutsu. Rei also possesses the Lava Release Kekkei Genkai. Unlike S, Rei also loves to fight and enters the World Tournament. She is one of the eight genin that participates in the Junior Division of the World Tournament. Her specialty are Lava Release, medical ninjutsu, and Water Release.

Tengetsu Hozuki
Tengetsu Hozuki is a member of the Hozuki Clan of Kirigakure and a trainee for the inheritor of Hiramekarei. He has a ruthless personality and a constant thirst for battle. After instigating trouble with Class A before the World Tournament, he is banned by Izuru from participating in the Junior Division. His specialty are the Hozuki-Style Water Release and Steam Release Kekkei Genkai.

Heizo Hattori
Heizo Hattori is a member of the Kiri Trio, along with Tengetsu and Rei. Heizo is a trainee for the inheritor of Kiba. He has a multiple personality disorder, which he somewhat controls by using a ring created by the Department of Research and Development. His specialty are snow creation using Ice Release and Lightning Release using Kiba.

Iwato Kamizuru
Iwato Kamizuru is a member of the Kamizuru Clan of Iwagakure. He specializes in bats and genjutsu. He is one of the eight genin to participate in the Junior Division of the World Tournament.

Mamushi
Mamushi is the son of Shirotsuchi and Aotsuchi. He possesses the highest academic grades in Class C. Mamushi specializes in stone ninjutsu, metal claws, and medical ninjutsu.

Touta
Touta possesses the Lava Release Kekkei Genkai which allows him to control ash and clay. He specializes in clay creations and barrier ninjutsu.