Sorae Igarashi

Sorae Igarashi is Ganta Igarashi's mother. She was a doctor who was involved in the development of the Wretched Egg and the Mother Goose System. She is most likely dead, but there are still mysteries around her death. In the anime, Ganta explains that ten years before going into DW his mother had died.

Appearance
Sorae has long black hair that is kept in a braid over her right shoulder. She wears regular clothes; a green sweater and light pants. Over her clothes she wears a white lab coat. She is always seen walking with sandals on.

Personality
Sorea seemed to be a loving and caring mother to Ganta, and mostly to shiro, treating her almost like her own daughter. She is seen crying to herselve many times thruought her time experimenting on Shiro, most notably when she plays the lullaby.

History
Ten years ago, Sorae lived and worked as a professor at the Medical Center together with Ganta. She and her team conducted research to heighten a human's immune abilities. Their "guinea pig" for this research was Shiro. Due to the inhumane and brutal experiments preformed on Shiro her mind developed a second personality to deal with the pain, their research gave birth to the Wretched Egg.

Plot
Sorae was a scientist working with Hagire and when they came upon Shiro (A.K.A the Wretched Egg) Hagire became sickly interested in Shiro and preformed gruesome "experiments" on her when Shiro couldn't handle the pain and formed another personality. At the time Sorae was completely destroyed knowing what she had done to Shiro. She often cried and played her piano singing different versions of the Lullaby. When The Wretched Egg could no longer bear the pain and caused the great earthquake she sent Ganta away to his father saying " I can't run away... That child... I can't leave Shiro like that." Ganta removing Shiro from his memories questions who is that and she tells him to take care. For the time being that is the last time we ever heard of Sorae.

Trivia

 * there are many mysteries surrounding sorea. It is unknown why Sorea kept performing the inhuman experiments on Shiro even as she treated her like her own child and felt great pain over what she was doing, or how she was able to come up with the lullaby system to keep the wretched egg contained, which can also only be opened by the one branch of sin possessed by her son.
 * It is unkown what the relationship between Sorae and her husband is. She and Ganta lived at the institute together and her husband was hardly ever mentioned, and it took the great tokyo earthquak for her to send him to live with him. it is unknown if they were divorced or just living apart.