I've worked up Theseus's armour in more detail, and had a close look at the head. I wanted to create a slightly other-worldly look. The character is young (about 20) and more brash and cocky than combat-hardened. I wanted a fairly high-tech look, but with a nod to the past, particularly with the bronze coloured metal.
The plan views are set up suitably for passing on to a 3D modeller.