The Graces are Thalia (Good Cheer), Aglaia (Splendor), and Euphrosyne (Mirth). There are other translations of their names, but these are the ones that suited me. They are traditionally depicted as identical ladies dancing gracefully, but if their names are any indication, they are not identical at all. In my imagination, Thalia has just told Euphrosyne a joke at the expense of Aglaia, who is a little full of herself.