Polyhymnia is the muse of hymns. She is shown meditative and serious at times, but she rarely smiles.
Meditative and serious, she is the one who rarely smiles. She does not like people who are extremely active, and she is a very calm, quiet and peaceful Muse. Polyhymnia has also considered dreaming, but so far that hasn't really worked out due to her serious nature.
She has a very long and flowing chiton, but perhaps one part is made of air.
Polyhymnia's official Greek name is Πολυμνια.