Ginnie confirms that this cat is indeed Ocean—like the Hempstocks, this cat cannot die. In a sense, this makes the case that a person’s friendships, whether they’re with animals or other humans, never really die. They can inspire a person long after they seem to end. When Old Mrs. Hempstock reverts to the old woman and confirms that it’s only ever her, it implies that Ginnie, Lettie, and Old Mrs. Hempstock as the narrator knew them might not even be three separate people—they may be one iteration of the same being, though the narrator is seldom able to see them like this.