Hau

The Kanohi Hau was the Kanohi Mask of Shielding.

Description
The Great and Noble versions of the Kanohi Hau enabled their bearers to protect themselves from any physical attack that they were aware of by generating a protective forcefield around themselves. The only difference between the Great and Noble versions of the mask was that the Great version formed a stronger and longer-lasting shield than the Noble version. The forcefield created by the Hau could not defend the bearer against attacks that they were unaware of, such as surprise attacks from behind. The Great Hau was one of, if not the most, recognizable Kanohi in existence, being used as the symbol of the Great Spirit Mata Nui in the Matoran Universe and beyond.

History
The Kanohi Hau was created by the Great Beings and introduced into the Matoran Universe as one of over 50 Kanohi variants to be worn by its inhabitants. The Hau became a favorite Kanohi for Toa to wear due to it being one of the symbols used to represent the Great Spirit Mata Nui. Individuals that wore Haus included 553 and his evil twin, Sreda, and Tahu (whose Hau was transformed into a Hau Nuva by Energized Protodermis).

The Dark Hunter Claw wore a gray-colored Hau that, despite being powerless, seemed to have anomalous properties. When Motrokh tried to peel the Hau from Claw's dead body, a sudden shockwave exploded that sent the corpse flying.

In 150,082 CMT, Perseus used his Kanohi Hau to block blaster fire from HK-47.

In 150,083 CMT, Perseus used his Hau to create a forcefield that he bolstered with his Platinum Lantern Ring to block Electric Ynot and drive him back. The main Ynot withdrew his clone and took a swing at Perseus, but Perseus used his Hau to block Ynot once again.

In 150,084 CMT, 553 activated his Kanohi Hau while he was being escorted to a prison cell, creating a forcefield around himself that pushed the guard escorting him away. 553 then headbutted the guard, but the guard recovered and neutralized 553's Hau with a power dampener. Meanwhile, Perseus activated his own Hau to block a shot fired at him by Strika on Cybertron. When Strika fired lasers at Perseus, he was able to block most of them with his Hau, but the shield eventually dissipated due to his own lack of focus.

On Day 12 of The Mazkertis Paradox arc, an unidentified Toa of Air in the Knights of the Keruvim used his Kanohi Hau to seal off the entrance to a decoy spaceship that the Dong Squad had sent to Vizima while one of his colleagues explored the interior.