Felicitar, from Ultima VIII
Felicitar is the Zealan goddess of joy.
She was scheduled to appear in The Lost Vale, where the Elemental Titans had locked her together with her fellow gods Doloras and Timyra into force fields. It obviously would have been the Avatar's job to free them to gain their help.
However, The Lost Vale was cancelled and the only mention of Felicitar is in a book about the old Zealan religion written by Yradan the Scholar.