Tatsushirou is a familiar of Rou.
The dragon boasts a huge body frame that is even able to compete against dragons of the [Emperor] class and can carry many people on its back. It also has high intelligence and a commanding presence.
Being much more tenacious than the current existing dragons, Tatsushiro's innate temperament is quite implacable.
Once he recognizes you as an enemy, he will relentlessly chase you until you are reduced to ashes.
Originally an 80 m fossil found during the [Flames of Fire Dragon Mountain] dungeon's remodeling, Rou revives the dragon with his ability [Fossil Restoration].