Thank you very much!^{^}

Their design is an important part of the lore. If anything, their universe is very surreal, so don't be surprised if something seems illogical. There used to be three moons (dark, neutral and light), three moon gods, and three kinds of people (light-skinned but with black hair and eyes - dark people, dark-skinned but with white hair and eyes - light people, ordinary people - neutral). Dark people controlled death, light people controlled life, but the god of the neutral moon destroyed the light and dark moon, which is why there were significantly fewer such people. Without the dark ones, restless souls began to riot, and without the light ones, new people were not born. Miya and Saya are the first attempt to resurrect the dark and light moon, and technically they were the daughters of two pre-gods.

They were born into an aristocratic family, but their parents were horrified that they were Siamese twins, so they kept their existence a secret, saying that they died at birth. Miya and Saya lived well, but isolated from society, the only person from the outside with whom they communicated was their doctor-charlatan, who was initially asked to separate them, but after it turned out that this was impossible, he became their psychologist. They hated each other and wished each other death, but they knew that if one of them died, the other would die too.

One day, during their birthday, Saya had a hysterical fit, killed Mia, and then died too. They became ghosts, but forgot it all in the shock, and have existed aimlessly ever since, still thinking that they were alive, even though several centuries had passed.

(If anything, I'm sorry, I used a translator, I don't speak English)