無邪気(むじゃき)さを失って(うしなって)急に(きゅうに)口数(くちかず)が少なくなり(すくなくなり)、寂しげ(さびしげ)になった

Eventually, Midori undergoes 'Kamiage' (hair-raising), styling her hair in an adult woman's fashion. This signified that she had ended her innocent childhood and prepared to live as a courtesan (the adult world) just like her sister. Since then, Midori, who used to be so high-spirited and tomboyish, suddenly grew quiet and showed a melancholy demeanor.