Kurozuka

was one of the last remaining members of the Land of Woods' Prajñā Group.

Appearance
Kurozuka wore the standard attire of the shinobi from his country: a high-collared flak jacket and a demon-like mask with three prominent horns and an open mouth to conceal his identity.

Five Kage Summit
He was part of the initial attack launched against Danzō Shimura to avenge the destruction of their group, but Danzō easily cut them down. Danzō then used Kurozuka's body to block the second wave of attacks.