Red Pyramid (Pyramid Head)

This lumbering, monstrous creature takes on the appearance of an executioner from the town's past, wielding an impossibly large sword known as the Great Knife and on other occasions a spear. It's depicted wearing a blood stained, triangular metal helmet. He relentlessly stalks both James and Maria and is the incarnation of the part from James's consciousness that believes he deserves punishment for murdering his wife and his repressed sexual urges. The creature is officially known as the Red Pyramid Thing according to the creator's commentary found in The Book of Lost Memories. However, the name can also be interpreted as 'Pyramid Head' which also was used in dialogue by the game's protagonist, James Sunderland. The latter name was widely used since the Silent Hill 2's release in 2001, two years prior to the publication of Lost Memories, and has since been confirmed as also another official title for the creature. - answers.com