Pozzo and Estragon
Pozzo is often compared to Estragon (just as Lucky is compared to Vladimir) as being the impulsive, right-brained part of his character duo. The idea is that Pozzo and Lucky are simply an extreme form of the relationship between Vladimir and Estragon (the hapless impulsive, and the intellect who protects him), and thus extreme forms of those very characters.
He, like Estragon, has an awful memory, and since he cannot rely on Lucky for memory (as Estragon can on Vladimir), he is even more in the dark (e.g. he cannot even remember one day before). Vladimir claims that he and Estragon know him, but this is naturally not corroborated by Estragon, and the nature of their former relationship remains unknown. He occasionally comes up with poetic metaphors for the current situation, again, just as Estragon does.
Read more about this topic: Pozzo (Waiting For Godot)