He has one younger brother, Tatsuha Uesugi, who is a monk-in-training.
However, Eiri Yuki overhears his amateurish verse and puts the young musician in his place.
He left the band three years ago to pursue a solo career in America but returned to Japan to reform Nittle Grasper.
Shuichi is excited at the news of Nittle Grasper's reunion, but that now makes Ryuichi his rival.
Stung by the man's criticism, Shuichi becomes determined to make him apologize.
Shortly after his friend Hiroshi Nakano helps him realize that he is attracted to the man in the park, Shuichi sees an interview on television that shows that the person in the park is in fact, the famous romance novelist Eiri Yuki.
Ryuichi is kind and sometimes seems to have the mind of a five-year-old, until he starts singing; then he becomes a really cool, mature, vocal god.
Other characters have noticed that Ryuichi and Shuichi are quite similar in their child-like manner.
He is over-protective of Eiri to the point where it becomes an obsession, and there are several incidents that make it evident that between his business and Eiri, Eiri will always come first.However, they disbanded three years ago and Ryuichi went to America to persue a solo career.There he met Mr K (Crawd Winchester) who became his manager. Even when Bad Luck and Nittle Grasper were up as rivals, he still treated Shuichi as a friend and helped him out a lot.He is the head of N-G recording company and demands the best from all his contractual bands.Tohma is very protective of Eiri Yuki, and blames himself for the trauma Eiri suffered as a teenager, seing that he was the one who hired Yuki Kitazawa in the first place.