A mysterious albino girl that Ganta encountered during his first days as an inmate. Clothed only in a skin-tight bodysuit and muffly gloves, which conceals her heavily scarred skin, Shiro stands out among the other prisoners due to her bizarre appearance and mannerisms. To Ganta, Shiro's manner of speaking and acting remind him of a small child, even though Shiro is the same age as him. However, Shiro possesses inhuman physical abilities and has an intimate knowledge of the prison, having apparently lived there most of her life. From the beginning of the story it is made clear that, as children, Shiro and Ganta were close friends. Ganta, however, has no memories of his childhood, which greatly saddens and annoys Shiro.