Valtiel

Valtiel is monster in Silent Hill 3 who stalks the heroine Heather Mason. He never attacks her, but in fact is "helpful" in weird sort of way, as he actually resurrects her in the case of a game over screen.

Mythology
In the mythology of the Order, Valtiel is an angel created by God when she was first born into the world. he is known as the attendant of God, and is viewed as the one who is closest to her.

Silent Hill 3
During the events of Silent Hill 3, Valtiel is seen in various places by Heather Mason. He is constantly turning a valve, which is symbolic of the shifts between worlds that occur throughout the series. Late in the game, if Heather dies, the "game over" screen consists of Valtiel dragging Heather away, presumably to ressurect her. In doing this, he is trying to ensure the birth of the unborn God that rests within her.

Influences
Valtiel is depicted as wearing gloves and an apron. The executioners in Silent Hill's early history based their uniforms upon these items, while adding a pyramid shaped hood. These accoutrements later inspired the creature known as Pyramid Head.

Also, the order priest Jimmy Stone formed his Sect of Valtiel around this creature. They worshipped it as the closest being to God, and therefore one of the most holy.