Kuu

空

Kuu is the youngest Haibane in the older group, having spent only two years more at Old Home than Rakka. She appears to possess boundless energy and is almost always cheerful. Rakka and Kuu grew close shortly after Rakka's arrival at Old Home. Kuu tells Rakka that she had wished for her to be a younger sister, but was glad Rakka turned out to be older, as she would have been assigned to the younger group otherwise. Kuu is curious and likes trying new things, which can sometimes lead to disaster. She once tried Reki's scooter and crashed into a telephone pole, and when she tried on Hikari's glasses, she became dizzy and fell down the stairs. She occasionally works at a cafe in town and is seemingly paid in sugar cubes.