Although I am not usually a huge fan of armour covering most of the body I think it works quite well on this picture, I especially like the mask that this man is wearing. I could implement any type of mask to my own boss which would hopefully look threatening.
Samurai Spirit Sumi 5 by derylbraun on deviantART
Live In Tattoo | Татуировки
Samurai Helmet Tattoo, artist unknown
Owl and Tree Silhouetted by the Moon Tattoo, without the foliage
#99 Tatuagens no Antebraço | Estilos Variados! - Tattoo Finder