Pekai is the female half of the pair of mythical beings around whom the Kiwai tales of the origin of vegetable food revolve. She is the wife of Soido, the bringer of garden crops, and her person is bound up in the tales with the first appearance of the cultivated plants that Soido afterwards transmitted to mankind. She is indexed as a figure in her own right in Landtman's corpus of Kiwai folk-tales.
Landtman, Gunnar. The Folk-Tales of the Kiwai Papuans (Acta Societatis Scientiarum Fennicae XLVII). Helsingfors: Printing Office of the Finnish Society of Literature, 1917.
Landtman, Gunnar. The Kiwai Papuans of British New Guinea: A Nature-Born Instance of Rousseau's Ideal Community. London: Macmillan, 1927.