Among many of the gods and goddesses worshipped Carol often invokes those of Bridget and Diana. Bridget is the Triple Goddess of the Celtic Irish. She is also known as Brigantia in England, Bride in Scotland, and Brigandy in Celtic France. 5 She is the goddess of smith-craft, poetry, inspiration, healing and medicine. Instantly, I was amazed by the similarities between Bridget and the Greek and Roman goddesses of inspiration: the Three Muses, to whom the poets like Virgil, and Homer would pray (vicariously through poets actually in their poems, or, as in Virgil, in the preface of their works).
The other goddess that Carol relates to is Diana. Diana is Goddess of the wild beasts and glens. She carried a crescent bow symbolising the moon. She is the Mother Goddess of Neo-Pagan Witches, and was a practitioner of white magick. Carol is careful to invoke this goddess because of its awesome and uncontrollable power.
There are other figures evoked like the Virgin Mary, or from the Arthurian legends: Morgana and Maurice. It all comes down to personal preferences, and what spirit the witch can (or would like to) identify with. As stated before, it doesn't necessarily have to be a god or goddess of the ancient religions. However, they usually embody their qualities in a pure form.