Brigid...

 

To my understanding, when springs tendrils and shoots arrive Cailleach morphs into Brigid, a maiden aspect. Some say Cailleach lays down her staff and turns to stone as the years wheel turns to spring, others that she fights Brigid for domination of the seasons, still others that the one becomes the other. Im sticking with the latter for now, or the stone theory, and its helping my connection to Brigid, to see her as a rebirthing of Cailleach.
There's some varying of opinion as to exactly which parts of the year bears each goddess mark but it makes sense for me that Cailleach rules from Lughnasadh (Autumn) to Imbolg (Spring), and Brigid the other half of the year, appearing as the plants and lambs are getting happy. Gradually, I'm learning Brigid carries the muse like qualities of spring energy, inspiration for poets, smithys and crafters, she's sometimes depicted with flames of inspiration, exuding from her hands.