Nauma

was once a member of the Twelve Guardian Ninja.

Background
While he was still alive he was part of the Twelve Guardian Ninja. When six of the members tried a coup d'etat he alongside Asuma Sarutobi, Chiriku, Kitane, Tōu, and Seito fought against them, only to be killed by Kazuma when Nauma and the latter three of the Twelve Guardian Ninja tried to use Limelight on him.

Twelve Guardian Ninja arc
At the start of this filler arc is Nauma's, Kitane's, Tōu's, and Seito's corpses are stolen by grave robbers, and later revived using lightning. After being revived they were all four approached by Asuma who had figured out the scheme of the robbers. There he tries without luck to stop the latter three who seems to have become mindless puppets. He started waking towards an unknown point emitting large amounts of lightning, only to arrive and prepare his part of the limelight technique. When Kitane was killed by Asuma Sarutobi, Kazuma's plan failed and he decided to release the summoned Nauma, Tōu, and Seito.

Abilities
He has an elemental affinity for lightning. When in the the four cardinal directions he, Kitane, Tōu, and Seito use a jutsu called Limelight to reduce everything within that area to ash.