A-ko (A子) or Eiko Magami (摩神 英子 Magami Eiko), a red-haired girl who seems to be near invulnerable with superhuman speed and strength, is the heroine of the series and lives in Graviton City, Japan. A-ko is usually friendly, cute and cheerful. She tries to lead a normal life, and spends a lot of time on clothes, a part-time job and romance in the sequels. However, she does have a fiery temper. She also has a large appetite and a tendency to oversleep on school days. She and C-ko are both transfer students to Graviton High, but wear their former school's sailor-style uniform for most of the film. She has an athletic figure and thick red hair that falls past her shoulders. She is dressed in her trademark school uniform (which later became a battle outfit), which is a white middy blouse with a