Whimsical
Explorer
One horror element is to violate a player's personal sense of what reality is supposed to be. This is why murderous little girls are disturbing. Children, according to common sense, are not dangerous and any adult can stop any child. In fact, children are somewhat helpless, are constantly seeking your attention and acceptance, and are dependent on your protection and guidance to make it through the world. Now, take a child and have them slowly reveal themselves to be a dreaded supernatural horror and the mind cannot handle it and will work hard to reject this incongruity by coming up with alternate explanations or just simply refusing to face it. This goes for other things. Community, family, home, pets, personal items, social roles, your body, mind, or soul, and even reality itself. What if you uncovered evidence that you will slaughter everyone you love in the future? What if you come across clues that you are stuck in a dream and everything that has happened is not real? What if mom and dad had you so that your body could be the new body of the evil force that they serve? What if you knew that everyone in town was being replaced by dopplegangers, but you couldn't prove it? What if you couldn't be sure that you are insane or not because you are uncovering clues for two opposite but distincly plausible possibilities for what's going on?