Mū

is the of Iwagakure.

Appearance
His body appears to be covered in bandages with only his eyes and nose visible. He also wears a dark colored headband with no markings.

Abilities
Muu has been seen to have some sort of ability that allows him to become completely invisible. It is hinted in his introduction that it's no easy task to catch him moving or being able to sense him.

Part II
Mū, as a former Kage, has been resurrected by Kabuto for the Fourth Great Shinobi War. Currently he is heading towards the Fourth Division's current location.