Xyçs

There was a planet called 'earth 1.0' in the 1st dimension. It was a place where the Celestial beings- that's what humans call them -lived.
Once upon a time, 5 siblings, sons and daughters of the planet's higher-ups explored the dimensions. They found 'the other earth' in the 3rd dimension.
They then landed on 'the other earth' and decided to stay there for observation. They also help humans do some of their work and they were praised by humans.
The youngest son named Xyçs is the strongest one among the 5 of them, he fell in love with an ordinary human who lives on earth.
He then had descendants who would later form the biggest and most powerful kingdom on human's earth that the royal family only contains people who have the sacred power of the youngest creature.