The term 'Pal of Piglet' refers to three characters from the Winnie the POOH stories by A.A. Milne: Roo (3 letters), POOH (4 letters), and Eeyore (6 letters). Roo is a young kangaroo who is Piglet's best friend, POOH is an anthropomorphic bear who is Piglet's closest companion, and Eeyore is a pessimistic donkey who is also a close friend of Piglet's. Together, these three characters form Piglet's circle of friends.