SUPERNATURAL ENTITY
The Spirit is described as a supernatural being whose life on earth is brief and ends at midnight, indicating its ephemeral and otherworldly nature.
SPIRIT
'Are spirits' lives so short?' asked Scrooge. 'My life upon this globe is very brief,' replied the Ghost. 'It ends to-night.' 'To-night!' cried Scrooge. 'To-night at midnight. Hark! The time is drawing near.'