The "petite sœur" of a "Rosa" is called an , otherwise known as a . "En bouton" is French for "in bud"—as used in the example "Rosa Chinensis en bouton"—and is unofficially considered part of the Yamayuri Council, as is the "petite sœur" of the "en bouton", if she has one. The "en boutons" must be in a lower year than their "Rosa", and generally the "en boutons" execute the plans discussed by the Roses, like assistants. Although the "Rosa" positions of the Yamayuri Council are traditionally passed to the "en bouton" on the graduation of the current holder, they are nonetheless elected offices which anyone may run for.