Who is the second spirit that Odysseus encounters?

The second spirit that Odysseus encounters in the Underworld is the prophet Tiresias. Tiresias provides Odysseus with crucial guidance and insights about his journey home to Ithaca, warning him of the challenges he will face and advising him on how to appease the gods, particularly Poseidon. This encounter is significant as it shapes Odysseus's understanding of his fate and the actions he must take to ensure his safe return.