What was the strangest thing about the way the spirit looked in the novel a Christmas carol?

Answer 1

The Ghost of Christmas Past was both young looking yet old and had a flame which lit its way through Scrooges past life that came from the ghosts head

Answer 2

The strangest thing about the spirit in "A Christmas Carol" was that it appeared as a mixture of different creatures, such as an old man, a child, and a kind of animal. This unconventional appearance added to the eerie and supernatural elements of the story.