In Goidelic mythology, especially Scotland, Cailleach was the "Mother of All". She was a sorceress. In addition to the Celts, the Picts also worshipped her.

In art, she was depicted as a wizened crone with bear teeth and a boar's tusks.

Each year, the first farmer to finish his harvest made a corn dolly representing Cailleach from part of his crop. He would give it to the next farmer to finish his harvest, and so on. The last farmer had the responsibility to take care of the corn dolly, representing Cailleach, until the next year's harvest.

She helped rescue Dia Griene, along with Brian.

Alternative: Cailleach Beara, Scotia