Who is an antagonist in Indian in the Cupboard?

Answer 1

Little Bear is the obvious antagonist. He makes many demands on Omri (the protagonist).

Answer 2

In "The Indian in the Cupboard," the antagonist can be considered to be Tommy Atkins, the British soldier figurine who eventually threatens Little Bear and Boone. Tommy is an adversary because he represents a conflict of interest and poses a danger to the main characters in the story.