Midoriko serves as the green sister among the Tea Sprites. She works at the "Cafe-Drop" within Shizuku Forest, preparing and serving tea. While polite in demeanor, she possesses a notably unusual personality. Midoriko wields a naginata as her primary weapon in combat or defense. Contextually within specific episodes, she is also known by the aliases "Compota-chan" (episodes 72 and 81) and "Mr. Ao" (episode 68). These alternative designations do not alter her core identity.