But now this old house seems haunted in a different way. A way that’s both more boring and more frightening.
-- Narrator (“Prologue”)

Importance: Bug notes that her uncle taught her that their house was haunted because it was so old. Before her uncle’s death, however, the ghosts never gave Bug any reason to fear them.

A strange face stares back at me, darkly reflected in the glass.
-- Narrator (Chapter 2)

Importance: This quote seems to indicate that someone Bug does not know is watching her as she washes dishes. Later, Bug explains further, that her face never looks like she expects it to look when she sees her face in the mirror.

It? Him? Her? A tall, thin, dark shape looming in front of my closed door. Is it a shadow? Is it moving?
-- Narrator (Chapter 3)

Importance: Bug wakes in the middle of the night because she senses there is something in the room with her. She sees...