Sarah Rushman better known as Marrow is a mutant in the X-Men series. She is a mutant with a different mutant power: detachable bones grow right through her skin. She is a member of the sewer dwelling mutants the Morlocks. Marrow was embittered by the harsh life she lived, first in the Morlocks' dark tunnels, and then fighting for survival in the dimension she was sent to by an evil mutant named Rasputin. Despite her hostile attitude, Wolverine decided to become her mentor when she joined the X-Men. He succeeded in training her to work as a member of the team. As Marrow slowly mellowed, she grew close first to Gambit, and later to Colossus.
A mutant able to control her bone growth, providing her with armor, clubs, and knives. As a child, she was taken in by the Morlocks where she would form the terrorist group Gene Nation before joining the X-Men. Her allegiances have shifted frequently since then. She was de-powered after M-Day.
Sarah's real name is unknown, as well as her place of birth or who her parents really were. From a young age she manifested bones which grew out of her face. This obvious mutation led her to be taken in by the Morlocks - mutants that felt themselves too hideous to live above ground - cursing herself to a life underground. She may even have been among the first group of Morlocks.
As an adult she often fought the X-Men, partly because she felt that their fight for peaceful co-existence with humans was foolish and also for revenge because of their inability to save the Morlocks during the Mutant Massacre. Some say she was jealous of their beauty and ability to be normal as well.
Sarah was a little mutant with the mutant power to see kindness in every person. She was a very close friend to Callisto, who saw her as a daughter. Marrow is one of the few surviving Morlocks to join Callisto'sNew Morlocks which is a group of mutants and humans living together.
Like most other mutants Marrow was one of 90% to lose her mutant powers although she would eventually get them back and managed to get extra abilities. Sarah Rushman regained her powers but at the cost of her unborn child even though her powers were restored Cable pointed out that the powers came from something else. Those powers could have come from her child so the doctor who helped her could have used the baby's powers to give Marrow new ones. If that is the case then the powers came at a cost she didn't expect. Another example of the unborn baby's abilities probably being transferred to Marrow is Sarah's personality change. After getting new powers but thinking her original powers were restored Marrow now has more of a child like behavior after the experiment. Because Marrow was one of the mutants to lose her powers and regain them she did not make it on the government's list of 198 mutants.
Marrow is Morlock who has survived many terrible events in her life. She survived the Mutant Massacre on the Morlocks avoid capture when surviving Morlocks had been taken the camp known as Neverland. Managed to escape death at the hands of Masque where other Morlocks weren't so lucky. One of the few members to survive the death of many Gene Nation mutants. The Gene Nation was another group of Morlocks but smaller Sarah Rushman survived from having her heart ripped out by Storm because she had two hearts. One of the mutants who survived the experiments done by the Weapon X Project and by Weapon Plus. Lost her powers on m-day managed to survive with out her powers and regain them. One of the living and surviving depowered mutants from the terrorist Morlock group called X-Cell others include Callisto, Blob and Fatale. Former member of the X-Force who joined them after Cable saved when she was left for dead.
Was brainwashed by S.H.I.E.L.D. forcing her to become a agent to help them destroy Life-Model Decoy robots. Faked her suicide with the help of Spider-Man so she could be free from S.H.I.L.D. however do to the brainwashing to help keep her implanted memories. She developed a split personality apersonality of her mutant self Marrow and the personality of a teenager with child like behavior that personality would grow stronger for Sarah after the experiment done on her to restore her lost powers. Marrow also survived the flooding in the Morlock Tunnels caused by Mikhail Rasputin Thornn helped Sarah and tried to find other survivors Sarah Rushman also lived through the battle of The Hill. Signs of Marrow's split manic child like personality goes all the way back to The Hill she became more savage because of Mikhail Rasputin and his Morlocks but those were just the early stages over time her manic and child personality grew much more after regaining her powers.
Oneof the many things that Marrow has gone through in her life was being held prisoner by MRD know as the Mutant Response Division however this only happened in the cartoons. Marrow managed to escape with the other prisoners after they had been rescued. She became friends with a reassembled go Sentinel know as Rover.
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