Rishia was the daughter of a fallen nobleman of House Ivyred. Her family had little money and just barely scraped through. The village they lived in was ruled by a Noble family that was obtaining their funds through illegal means and Rishia’s parent tried to sabotage their operations. But all of their money was secretly taken by those people. All the villagers who also raised complaints against the noble family were silenced. Then, as Rishia’s family had no money left to pay taxes, the Noblemen proposed that they could give Rishia in place of money. They threatened that they would kill her family if her parents didn't comply.
That evening, Itsuki and his companions infiltrated the Villainous Nobles’ Mansion and used the authority of the Hero to put an end to their dealings and save Rishia. Rishia felt greatly in debt to her saviors, and decided to join Itsuki’s party.