Chapter - The Ghost
The ghost is a person. The description of the ghost is "Leaves whirl and flutter without falling, around a disturbance in the air that takes a vaguely human shape." The indefinite article of the ghost is "the". The ghost is neuter. The ghost is ambiguously singular.
Understand "leaves/figure/human/limn/spirit/wraith/leaf/flutter/disturbance/shape/air/whirl/vaguely/twirling/whirling" as the ghost.