Katsumi Asakawa

The daughter of Sumire and Shuuichi. Because of the belief that Sumire and Shuu are brother and sister they hide the fact that she is their daughter explaining her as being their youngest sister. They do this so that she will be able to live a normal life free of persecution. Being the daughter of Shuuichi this would make her a 3rd gen "zero sample" however her power is never seen other than the fact that she can pilot the "SG Armor"