Who is the antagonist in The Poetry of Robert Frost by Robert Frost?

"Bereft" is arranged in three sets of five rhyming lines followed by a single, lonely line without a rhyme at the end. It is a poem about the wind changing to deepen its roar, with imagery of nature turning antagonistic as leaves coil up like a snake and strike at his knee. The character supposes that word must have gotten out about his being alone in the house, alone in the world, and the final line confesses that he has no one left but God.