On the surface the planet resembles an idyllic land of green plains, and sparkling rivers. It appears peaceful and its people simple, dressed in Greek togas, while buildings similar to the Parthenon in Greece litter the surface. However underneath the ground is advance technology and cities.
The planet appears to be run by a ruling council of elders. How they are elected is not entirely known, if by vote, based on age, or a combination of the two. This council sits over judicial matters as they were the ones who sentenced Heller and his followers to exile. Among the council the Grand Elder sits at the top as the most respected leader, and seemingly ultimate authority.
- People of U40: The average citizen of U40
- General Warriors: The average warriors, unlike the Great Eight they do not have the power to become giants, lacking the star medals on their chests.
- Great Eight:
- Great Sage
- Ultraman Titas
- Martyr: An unseen friend of Titas
- Former Natives: The exiled natives who wanted to turn the people of U40 into the conquerors. They have since become enemies of their former homeland.
- The people of U40 are very obviously based on Ancient Greece, given their style of dress, and architecture.
- The Ultras from here are known for being muscular in depiction, possibly due to the animation style. Whether by intention or coincidence this does flow well with their Greek Theme as the Greeks were the one who invented the Gym and bodybuilding.