The Teru Tribe テル族, teruzoku?, lit. "Teru Race"), also known as Necrofamilies 妖家, youke?, lit. "Calamity Family") by the people of Sol Cluster, are a group of half-dragon people, which have a tail and horns on their head, and they have an average life span of roughly 200 years. They also protected the land of Sol Ciel from the Viruses with the Apostles of Elemia at the end of the Second Era. They were held responsible for the Grathnode Inferia incident after they broke their neutrality agreement near the end of the Sol Ciel-Sol Cluster war and take upon themselves to prevent people from traversing the Tower following the Covenant of Elemia.