Silent Hill is not really known for its combat. The focus was usually on trying to avoid combat rather than taking out any enemy in your path. Your characters are survivors in a nightmarish hellscape of the minds of those who reside within, created through the supernatural powers that influence the town. Due to this, the antagonists take on many different forms.
There is one, however, that stands far above the rest. One who's menace is so great, you can see the aura of malice around him. One who haunts you throughout your journey. One who is seemingly invincible.