This Toa of Earth is an archivist living on Spherus Magna. He wears a Kanohi Hau styled after the mask worn by a hero of long ago.
(links to higher resolution images under the pictures)
https://www.flickr.com/photos/lubrickon/14807596105/
https://www.flickr.com/photos/lubrickon/14784592606/
https://www.flickr.com/photos/lubrickon/14620878760/