If you're looking for manga similar to Ethnicity 01, you might like these titles.
A science fiction story set in 2264 which follows the adventures of 18 year old Nonnonzie, a beautiful young archeologist. Humans have moved out among the stars, and Nonnonzie spends her time searching the galaxy for "star pieces" and items such as pudding. Nonnonzie really likes pudding.
The number of humans has plummeted in a world where a deadly poison was scattered by the explosion of a research facility. One day, Dr. Murakami discovers a woman who was the survivor of that explosion. Her name is Mae. The appearance has become that of a young girl in the first half of her teens, although it helped to create the body which just waits for death newly. In a world where there are no young women, her existence has become the fate of humanity, and the army has sent out an artificial life thug called "the Daughter of God." The fight to survive begins!
It’s been hundreds of years since mankind immigrated to the planet Rafnas. The planet is abundant in the natural anti-gravity substance called “Rafna”, and the humans there unknowingly took it up inside their bodies and gained the ability to fly at will. Our story starts one day as the woman Lima, who has strong abilities and came to the village to investigate the river, meets Ragi, a man who has no Rafna inside him and can’t fly.
In a small land in the Alps is a great fortress of a country intent on taking over the world. In this world were born the twin sons of a great scientist who had been working on inventions for his country but was killed. The two sons are sent to the slave pits, but one is rescued and raised as royalty. These two sons will find themselves against one another as one leads a slave rebellion, which leads to the other taking power…