The Ouroboros symbol represents self-reflexivity or cyclicality, especially in the sense of something constantly re-creating itself, the eternal return, and other things perceived as cycles that begin anew as soon as they end (compare with phoenix).
Barnaby Ward- love this. She needs curly hair and to not look so sad. Maybe a little gap-toothed grin? No labyrinth. No key. Maybe a poppy in her hair instead and her ams need to hold a radiant (virgen de Guadalupe style) heart.