Ruri Fujisawa is the younger sister of Tomohiro Fujisawa, a manager at Sweetfish Productions, the company behind the Lovely Idol group. Determined to join the group's third generation, she personally approached Mariko, the company president, to secure her place. Her cheerful personality shines through, though her close bond with Tomohiro sometimes leads him to find her attentiveness excessive.

As a member of the third generation Lovely Idols, Ruri specializes in voice acting. Her dedication is evident in her fandom for the Magical Girl Sally series, which culminated in her landing a role within it. Her family includes an older sister, Miki Fujisawa, who is also a manager at Sweetfish Productions and played a part in recruiting Tomohiro. However, Ruri maintains a notably strained relationship with Miki, consistently addressing her coldly and refusing to use familial terms like "big sister," suggesting unresolved family tensions.