Idder Grisdia, (-2533, ?) was a builder in Sidubu Cave.
Idder believed in Shamanism.
He lived a life of poverty. He was able to eat and sleep under a shelter, but ended with having no possession at all. He was considered as belonging to the lowest caste. However, he made some friends among it. He had only a basic knowledge that summed up to a few oral stories from childhood. He was force of nature, and people saw in their body and beauty the incarnation of a god. In the life, he was able to take a few important life-changing decisions.