Ouka Hayasaka

Ouka Hayasaka (早坂桜花, Hayasaka Ōka) is the older twin sister of Shusui, and student president of Ginsei High. Ouka specializes in hacking and computer engineering as well as having a sharp mind. She and Shusui originally work for L.X.E. After the L.X.E. is defeated, Ouka works for Papillon to keep Kazuki from being killed. According to her character profile, she especially likes espresso.

Ouka uses Kakugane XXII, which manifests as the Buso Renkin Angel Gozen (エィンジェル・御前, Einjieru Gozen), a set consisting of a bow, an autonomous robot, and a glove. It attacks using a stream of arrows aimed by the robot, and by pulling back on the bowstring with the glove, an arrow that transfers damage from the target to the user.[clarify] This is good for long-distance attacks, but ineffective when fighting close-quarters. The robot is unable to speak until Bravo turned on the sound mechanism. Ouka later takes Dr. Butterfly's Kakugane LXX, and while she uses it, Gozen's wings turn into butterfly wings. Voiced by: Hitomi Nabatame

Gozen (御前, Gozen) is the automatic doll[clarify] Buso Renkin that is Ouka's "other" personality. Gozen acts as the main messenger between Papillon and Ouka, as Gozen's heart-shaped head ornament can receive and send messages and be used as a camera. Gozen is very hyperactive and loud (unlike Ouka) and has a tendency to shed pieces whenever Papillon does something strange. He also suffers from urinary incontinence when he is frightened, as demonstrated when Tokiko threatens to tear him apart for his sarcasm. Voiced by: Wasabi Mizuta (Japanese), David Lodge (English)

Source: Wikipedia