Waimariwi is the senior of the two Wawalag sisters (known in north-central Arnhem Land as the Wagilag sisters), ancestral women of the Dhuwa moiety central to the Kunapipi cult. Travelling north from the inland country, the sisters named the plants, animals and places they passed, and one of them carried or bore a child. When they camped at the well of the Great Copper Python at Mirrirmina, the elder sister's blood ran into the water and roused Yurlunggur, who rose with the rains and swallowed the sisters and their children, later disgorging them. The myth and its ritual were recorded by W. Lloyd Warner and analysed by Ronald M. Berndt; the sisters' ordeal models the death and rebirth dramatised in initiation.