It’s Staring at Me
Fake or real, one of the most terrifying and horrifying characters in the series isn’t a fantasy. Not even close. Although the series goes through many mystical beasts and fantasy wonders, none of those elements are even close to how petrifying one of the “human” (if we can say that) characters there is.
The scariest character in the Twilight series is Renesmee when she was a baby. When people are terrified of a crying or laughing baby in a dark and empty hallway ready to give chase, those people think of this baby. The original idea was to use an animatronics baby for the scenes, but instead, they picked CGI instead.