Crossover: An Alien Visitor

Rui An was originally the transliteration of the name of a cosmic disease. It spreads quickly, takes a long time to show symptoms, and the only cure is to exercise more. (Also known as laziness cancer.) A scientist chose this name for himself, then gave it to the only artificial human he created. In the final days before his planet's destruction, the scientist sent the artificial human to Earth, countless stars away, to investigate whether it would make a suitable new home, though we all know that was a lie. #Top, pairing undecided. The protagonist has a flashy yet adorably clueless golden finger.