I fricking love the Silent Hill series so I decided to experiment with Pyramid Head. Especially with his scars, the blood and rust, and the symbols, The Halo of the Sun, placed on his back, and the Seal of Metatron, drawn on the helmet sitting beside him.
Most of it was colored with markers. For the blood/rust on the Great Knife, gloves and on his skirt thing, I layered red and a light brown. For the rust on PH's helmet, I colored with light red coloed pencil and went over it w/ red marker. For the other helmet, I made a base of light red and went over it w/ the light brown.
The scars and the Halo of the Sun on his back were the more...interesting things to color. I took a purple marker for the older scars and drew them in. Then I took a light pink and went around the scars to make them seem irritated. For the Halo, I drew the symbol on w/ red marker. Then, I took the pink marker and went over it, like I did w/ the scars. Not only did I achieve an irritated look, but it also gave the Halo a bit of a glow.
I didn't really get very symbolic when I first started, but it kinda finished that way. I found it interesting that Pyramid Head shows up in later titles even after the two Pyramids impaled themselves in SH2. So I drew the helmet style from SH2 and a shortened, (most likely broken) javelin to suggest PH mourning the loss of his clone. Maybe, I don't really know; it's up to what you think.
I don't own Pyramid Head or the Silent Hill games, Konami owns them.