In StarCraft 2, Adjutants were a form of artificial intelligence used for everything from storing data to performing decryption. Cosplayer Christina Erring Bårdsen recently completed her Adjutant build, and she documented every step of the process on her blog. For the elaborate headpiece, she started with a styrofoam head:
I started with a Styrofoam head and covered it with worbla, then I had a base to add other details on. Because I’m cheap I use a base of cardboard for some of my details instead of double worbla layer or craft foam core.
The mohawk portion of the headpiece is simply folded worbla, and she also used worbla to make plugs to fit in the tubes. She applied a layer of black gesso and then applied silver paint for highlights.
For the shoulder armor, she used a plaster Easter egg for the basic shape, formed cardboard over it, and wrapped worbla around it. For the circular shape on the armor, she shaped worbla over a hair product box (pictures here) and added four 3mm orange LEDs to it. She covered the armor with black gesso and made it look metallic with “silver base paint and black wash. Details with acrylic paint and silver marker.”
This video goes over how she applied her makeup: