A young girl with a fascination with Buddhist statues and art. She enters Lillian Academy (a strictly Catholic institution) by mistake. She has a fierce temper that contradicts her calm exterior and becomes Shimako's petite soeur as Shimako enters her second year. (Source: Wikipedia) In the second season, Noriko becomes Rosa Gigantea en bouton, her grande soeur being Toudou Shimako.
Rei's grande soeur; one of the most well-respected of the Yamayurikai. She is very gifted and good at almost everything, although she is also enigmatic and eccentric. She has a large forehead, which Sei made fun of when they were young, which began their rivalry. She said once that she chose Rei as her sœur to see if anything interesting would happen. She often has friction with Yoshino, as the younger girl is jealous of her bond with Rei. Eriko has four older brothers. After leaving Lillian, she studies Arts. She hates the dentist above all else. (Source: Wikipedia)
She is part of the Kendo Club and is an admirer of Rei Hasekura. She went on a date with Rei in the first season after finding Rei's card in the treasure hunt on Valentine's Day. In the fourth season she is the finder of Yoshino's card. (Source: Wikipedia)
A big fan of Yumi Fukuzawa, who only made a brief cameo appearance in the second season of the anime. She is 178 cm tall, and referred to by Marimite fans as Denpa. She is presented as one of the girls who may become Yumi's petite s�ur. She is introduced in the fourteenth novel, Suzukaze Satsusatsu. (Source: Wikipedia)