Ceres: Celestial Legend, Volume 4: Chidori — Yuu Watase

Chidori Kuruma wants to help her sickly younger brother fulfill his dream of flying. In order to do so, she travels to Tokyo to enlist the aid of Ceres. Unfortunately, Chidori and her brother have a strange connection to the Mikage family and the nefarious C-Project. There's much more to Chidori than meets the eye. Her hyper-cheerful shôjo exterior belies inner turmoil and dark secrets that even Chidori isn't aware of...