What is the characterization in The Raven?

In "The Raven" by Edgar Allan Poe, the main character is haunted by the raven, a symbol of death and despair. The characterization of the speaker reveals his descent into madness as he becomes increasingly obsessed with the raven and the loss of his beloved Lenore. The speaker's emotions and thoughts are vividly portrayed through his dialogue and interactions with the raven, creating a sense of unease and foreboding in the poem.