This is Widow she was made after Shadow in other words she is Shadow's sister thought Shadow and her never meet she did see Shadow and watch him from video feeds but when GUN came to ACK to stop the Doc's so called plan with Black Doom she did what she was told to hid and she did she put her self into a capsule and was frozon for 50 years like Shadow but some time after Black Doom tryed to take Earth he went back to ACK to make a like clone of Shadow to use but he found a Video about Widow then he woke her up using some of Shadow's blood he just so happen to get to make a clone when she woke he took her to the 3 Eggheads Eggman Eggman Nega and Robotink there she stays helping them untill Black Doom calls her she knows her past and the little machine on the back of her belt is a video and phote saver it shows her that her past is real Shadow Maria and the Docter