Since the Renaissance Erato is often shown with a wreath of myrtle and roses and holding a lyre or other musical instrument.
At Lykaion was an oracle, presided over by the nymph Erato, whom Pan inspired, as Apollo the prophetess at Delphi.
Joseph Campbell -- The Hero With a Thousand Faces
Now, Erato, thy poet’s mind inspire, And fill his soul with thy celestial fire!
Virgil -- The Aeneid
They were Clio the muse of history, Euterpe of music, especially the flute, Thalia of comedy, Melpomene of tragedy, Terpsichore of dancing, Erato of erotic poetry, mistress of the lyre, Polyhymnia of sacred poetry, Urania of astronomy, Calliope of eloquence and epic poetry.