:There wouldn't be a "the Goddess Tridevi" because "Tridevi" literally means "three goddesses" and refers to the conjoined trio of Saraswati, Lakshmi, and Parvati (whose demon-fighting aspect is Durga). The Navratri ("nine nights") festival celebrates that trio: the first three nights for Durga, the second three for Lakshmi, the final three for Saraswati. —  /