Who are the characters in the poem The Raven?

The characters in "The Raven" are only the speaker and the bird. The speaker is alone, and it can be assumed that he wants to keep himself in isolation. The speaker is kept in the grip of grief from the loss of his love, Lenore. He seems to want to be kept company with only his memories and his grief over Lenore.

While Lenore is not physically present in the story, she is definitely a presence.

The speaker discusses the many wonderful qualities, as well as his inadequacies, basically to himself, but the raven does respond to his laments.