The third Steel Angel built on the design by Dr. Ayanakouji, she was activated by the Academy to destroy Kurumi. She later joins Nakahito and the group, originally to figure out Kurumi's power, but she eventually develops a crush on Nakahito. It was all thanks to Nakahito that Karinka became friendly. Karinka is rather infamous for kidnapping, and nearly killing Saki. (Source: Wikipedia)