Yukiko Amagi is a rich and elegant young woman who is popular with boys and girls alike. At first, Yukiko is very introverted due to not accustomed to becoming the local Inn's heiress, but she gets livelier after she is rescued from the Midnight Channel. Often scoring the best during exams, she is intelligent and often repeats the material with her best friend Chie Satonaka. Despite being intelligent, she is prone to lapses of judgment and moments of clumsiness.