The "petite sœur" of the "en bouton" is called —as used in the example "Rosa Chinensis en bouton petite sœur"—and is otherwise known as the . She must be in a lower year than her "en bouton" and performs small duties; such as attending to the Roses' "en bouton"s, cleaning the Rose Mansion, and making tea and snacks for the Yamayuri Council. This lasts a school year; and the following year when their "en bouton" is elected as "Rosas", the "petite sœurs" become "en boutons" automatically.