While they can have any shape ranging from normal animals like birds, cats or dogs to fantastical creatures like dragons, they are distinguished from the normal animals by the fact their DNA is triple-stranded, forming a triple helix rather than the normal double helix all creatures have. Thanks to this, they can communicate with the humans through the sharing of their consciousness through the Genometrics. While Genoms were relatively abundant during the times of Ra Ciela, most of them went extinct when said planet was destroyed 5000 years ago, so only a scarce number of them remain now.