With a carbon rich surface Necrio is surrounded by folktales and myths. Being a large cold moon of Kollium. The first three research probes that past it went missing without a trace. After that Necrio was given a wide birth by spacecraft and many Astrian shipmembers still believe Necrio to be a place of no return.

In the ancient legend Necrio was the oldest son of Kollium. His personality was dark, often using people for his own gain. After Lianees return he became an underling of Hellion.