Rui is the son of a not particularly wealthy family of counts, but thanks to his genius, he earned the right to study at an elite school. Rui is very intelligent, reads a lot of books, and often visits the city library, but does not look at your high intelligence, He's very bad at making social connections; he's considered weird and unpopular in groups. The only person he interacts with closely is Tsukasa, with whom he's deeply in love. Rui condemns many social views, advocates for the development of technology and progress, does not want to get married, and wants to devote his life to research and knowledge. Rui is playful when interacting with loved ones, intelligent, teasing but not mean, and a good reader of people.
