|Allies||Claire, Alys, Delwyth, Bethan|
Eira is a young girl living in the village where Claire was found in the sea. She was midwifed by Alys the same year as her best friends, Delwyth and Bethan, and the three girls frequently appear together.
Eira first appears at Alys's window, shortly after Claire is brought in.
Later, after Claire has recovered, the girls are playing tea party at a corner of the meadow, which they call their "Tea Place". Their game causes Claire to feel very sad.
In chapter four, they try to convince Claire to pet a chipmunk they tamed. In another section, the girls are making a pretend house out of sticks on the beach.