Eiko Magami

Eiko “A-ko” Magami is a cheerful and polite girl living in Graviton City who tries to lead an ordinary life despite extraordinary physical abilities. She appears nearly invulnerable and possesses superhuman speed and strength, which are restrained by the armbands she always wears. Her longstanding friend is C-ko, whom she has known since kindergarten, though C-ko's immaturity can test A-ko's patience.