On Sucia Island, leading up to the events which would be called the First Sucia Island disaster, Defniel was the Shaper administrator responsible of the schooling and training of the Shaper researchers on the island.
In Geneforge 1, the Playable Character can find scrolls with some of Defniel's writings on it. On one in particular, Defniel makes it clear that a small party of Shapers are under the opinion that one day they will return in order to finish their work.
"I, Defniel, of late of Sucia Island, leave these notes here. In case all of our great work is destroyed, I want to ensure that some, someday, find the glorious secrets we have uncovered."
"Damn the Geneforge! It would have all worked out if they didn't push things too far!"