The Shadow Stalker. It implies a creature that hunts in the shadows, unseen until it's too late. Just the name gives a sense of unease as if something is constantly lurking where the light doesn't reach.
The Abyssal Terror. 'Abyssal' refers to the deep, unfathomable abyss, a place full of mystery and danger. A monster with this name would be something that hails from the darkest depths and instills pure terror in those who encounter it. For example, it could be a giant, tentacled beast with glowing eyes that rises from the ocean depths to attack ships. It's a name that combines the fear of the unknown and the power of a great and terrifying force.
Names like 'The Demon's Lair', 'The Witch's Hut in the Woods', and 'The Abandoned Asylum' are great for scary stories. 'The Demon's Lair' implies a place where evil entities reside. The woods are already a bit scary in general, and a witch's hut there adds more mystery and danger. And asylums have a history of being places full of madness and horror in many fictional works.
The Eerie Everwood. 'Eerie' sets the tone of something strange and unsettling. 'Everwood' gives the impression of a large, perhaps ancient forest that has a long and dark history, full of mystery and fear.
The Shadowed Thicket. The word 'shadowed' makes one think of dark and hidden areas, and a thicket is a dense growth of bushes or small trees. It's a great name for a forest area that seems to be filled with things lurking in the shadows, waiting to jump out at the unsuspecting.
The appearance. For example, if a monster has sharp fangs, glowing eyes, and a huge, hulking body, it can be really scary. Just like the werewolf with its long claws and menacing growl.
One classic scary monster bedtime story is 'The Boogeyman in the Closet'. A little boy always thought there was a monster in his closet at night. Every time he heard a creak, he was sure it was the Boogeyman coming to get him. But one night, he bravely opened the closet and found it was just his old football that had fallen. It taught him not to be afraid of the unknown.
The information about the names of the monsters in the novel was scattered, and there was no clear recommendation list. Therefore, I am unable to provide a specific answer.
Ophelia. It brings to mind the tragic character from Shakespeare. Her story was filled with madness and death, making it a great name for a spooky tale.