Thundercloud Unit

The Thundercloud Unit is a special backup unit, belonging to the Supply Unit of the Allied Shinobi Forces from Kumogakure. It is composed of seven members who are well versed in kenjutsu, formed by twelve to thirteen years old kids. Despite their young age, they were considered prodigies in their village own home town, that earned them a place in the war.

History
During the Fourth Shinobi World War, the Thundercloud Unit was sent to the Seventh Front in order to back up the Amphibious Search and Destroy Unit, who had been overrun by two thousand White Zetsu clones. Sometime during this, they became trapped within a large statue on the battlefield after the White Zetsu used the surrounding, poisonous red soil to create a vast smokescreen of poisonous gas. After speaking with his team-mates within the statue, Yukai, the leader of the group, and the others emerge to fight the Zetsu and face their fate. In the ensuing fight, Yukai is injured, however, Omoi, who had come to rescue them, appears and fights alongside them. At this point, using the Lightning Release Co-Operation: Thunder Bomb technique, the group is able to neutralize and finish off the remaining White Zetsu.