Who is the antagonist in the novel, Miss Hickory?

Miss Hickory has an ambivalent relationship with Squirrel. Though selfish, Squirrel is more likable than Miss Hickory, but because of his fondness for nuts, and his irresponsibility in collecting a winter supply of them, he is a threat to the nut-headed doll. In one scene there is a flicker of possibility for them to become friends. Miss Hickory, because she is afraid for her head, loses this chance to gain a friend.