Reading Bierbach I get the idea that GD26 may show a dead and mummified person, perhaps to be called akuaku:

"The name akuaku, now used indiscriminately for lesser gods and spirits, must have meant originally only ghosts or spirits of the dead, although it is not found elsewhere in Polynesia with this meaning. Desmedt ... considers the Easter Island term akuaku cognate with the Mangarevan akuaku, which means 'thin, speaking only of men and women'. This parallel is supported by the Easter Island idea in which ghosts resemble emaciated men'." (Métraux according to Bierbach)

While updating my Polynesian dictionary with akuaku as translated by Vanaga and by Churchill I happen to note that the fish 'dorado' is called aku in the Rapanui language. And according to Churchill akuaku may mean 'to swallow' - cfr 'the Great Fish that swallowed Jonah' (the constellation Delphinus). Via Internet I check how NGC2070 looks and borrow an image. Another meaning of aku is 'ball', and perhaps the Tarantula Nebula (as it is called today) may look (with binoculars?) like a fuzzy ball:

Here is the right time and place to tell the story about the wooden images. And as to why GD26 may show an akuaku we must start with the mummification process.