Domineering Space Queen

A post-apocalyptic girl traveled through ancient times and became a nine-year-old orphan. Her parents died, her family property was taken away, and her original owner starved to death. The Queen is online, playing the best, and living a small life of eating and drinking. My heroine is sometimes mentally retarded and spends money generously without considering the price. She is a fool and has too much money, so she just wants to be happy. She was born after the end of the world and doesn't understand some common sense things. She is a growth-oriented heroine. There are some top-notch ones in the front that can be skipped, but the rest is normal.