Noriko Nijou is a main character who first appears in the second season of the anime. She is a young girl with a deep fascination for Buddhist statues and art, which stands out given that she attends a strictly Catholic institution. She enters Lillian Academy due to an unexpected turn of events rather than by deliberate choice. Her appearance is notable for her very plain, jet-black hairstyle that gives her the look of a traditional Japanese doll, a stark contrast to her grande soeur. Her personality presents an interesting contradiction: she has a calm and composed exterior, but beneath that she possesses a straightforward and fierce temper. This can make her seem awkward in social situations at times. In the story, Noriko becomes the petite soeur of Shimako Toudou and takes on the role of Rosa Gigantea en bouton, the younger sister in the Rosa Gigantea family of the Yamayuri Council. Her relationship with Shimako is central to her character, forming a bond that helps her develop and open up emotionally to others. She is also deeply dedicated to her family, particularly her older sister Eriko Nijou, who was a former member of the Yamayuri Council. Throughout the season, Noriko's motivations are driven by a desire to fulfill her responsibilities and gain recognition for her efforts, often working hard to prove herself within the school's social structure. As she interacts more with her peers, she gradually becomes more expressive and learns to navigate her emotions, showing notable growth from a reserved and sometimes confrontational individual into someone more comfortable with vulnerability. Her intelligence and composed demeanor make her capable, and her unique interest in Buddhist art adds a layer of depth to her character within the largely Christian setting of the school.