The Ultra People are the natives of Planet U40 in the Planet Ultra U40 World. They are a race of Ultras, with their planet serving as that universe's equivalent to the Land of Light.

The people hailing from the planet U40 were originally a race of beings almost identical in appearance to the people of Earth. These ancestors would plant colonies on different planets, the colonists without technology or weapons, forming new civilizations either on their own or by interbreeding with the native humanoid civilizations, in this way did they become the progenitors of many, possibly all, other humanoid species that came after them. This includes humanity, through the interbreeding of the native neanderthals and the Ultra colonists.

The first major difference between the Ultra People and the Residents of the Land of Light is that, among the U40 Ultras, only eight are known to change their size. Their regular size appears to be that of a normal human being but, Amia is later seen at giant size in the series, having learned to grow to around half of her brother's regular size.