One of the shinobi sworn to protect Tsumugi, Hagane is a ninja with a partially mechanical body. Not only can her right arm extend and contract at will, but it can also emit a high-voltage current. Supportive and nurturing to the women around her, she heaps affection on them while paying no mind to their blushing. She does not pay her enemies any mercy either, and possesses a cold, pessimistic side grounded in a belief that fighting fate is futile. She unwinds after work by sipping on a nice glass of oil.