She's the heavy metal of Hatsune Miku. And she sings Utsu-P's song. Utsu-P is a vocaloid producer best known for his heavy metal songs. Hagane Miku is seen as a rebellious person with a strong personality. She has silver/gray hair with red eyes. She's a big softie with a huge temper. Hagane Miku's best friends are Hagane Rin, Hagane Luka, and Hagane Rin. "Silver hair"+"Red eyes"+"Pale skin"