|Japanese name:||小鳥遊 空|
Height: 152 cm
She is the oldest of the three sisters. 2nd grade in the middle school, 14 years old. She has tsundere personality. She normally refers to Yuuta as older brother (Onii-chan). She is a good student in school and is not good at cooking.
Spoiler: TVIt is visible that she has a crush on Yuuta Segawa in episode 1 and likes older guys like Miu.
Spoiler: OVAIn the final OVA, it is known that she and Yuuta are engaged.
Voiced by: Uesaka Sumire