one point symbols on its surface appear to glow; each symbol then gradually disappears as if counting down. Once all the symbols disappear, the core becomes brightly illuminated. Gio later states that he is Thanatos's successor after having visited it in hopes of saving Toa. Near the end of the anime, Thanatos reveals itself to be a huge dragon, which is capable of releasing billions of dragon spawns resembling Ostrum, the fourth original dragon. It also possesses a soul, which is made up of countless beings' "spirits" or consciousness. It had ordered the three original dragons to check up on the Earth-made dragons, and had wanted them to return without making Resonances, but after their failure, it sends Ostrum to destroy the eggs instead. After seeing humanity's nature, it deemed them foolish, and wanted to destroy it, but after showing interest in Jin and Toa's love for each other, it instead wants to fuse with all of humanity at the expense of human life. In the final episode, Thanatos's true nature is revealed: its main core is a silver sphere containing a female humanoid, whom Toa calls "mother". She realizes her faults, admitting that she has been alone for too long to understand what true love is, and decides to move on to the next planet as she contemplates its true meaning, though she expects to return to Earth. In Greek mythology, Thanatos was a personification of Death and Mortality. International Solarsystem Development Agency (ISDA) The ISDA is a joint space exploration agency, which is basically an integration of every space agency on Earth. New Ogasawara is designated as its primary base, but it has successfully built bases and other structures around the world, including a base on the lunar surface. ISDA029 Flight Accident The ISDA029 shuttle flight from two years ago, which Jin and his family were involved in. After the shuttle exited the Ogasawara Space Port, it blew up and fell towards the ocean. The only survivor was Jin, who suspiciously had no major injuries despite falling from a high altitude. The ISDA investigated the incident and determined that it was due to pilot error, blaming Jin's father, who was the shuttle pilot. In truth, the true cause of the accident was the dragons from Thanatos; when they entered Earth's atmosphere they crossed paths with the shuttle, accidentally destroying it. Located in the Ogasawara archipelago and consists of