Feral was always the ticking time bomb of X-Force especially when it came to teammate Siryn, barely capable of controlling her deadly temper. Prior to joining the group, it was later revealed that Maria and her sister Lucia (who later became known as Thornn) had to leave home and lived with the Morlocks. It was later discovered that both girls had been abused by their cocaine addict stepfather; in retaliation, Feral killed the man and shoved his body into the wall. Her mother, who was also addicted to cocaine, found out and sought vengeance on the girl by killing all of her pet pigeons. This infuriated Feral to the point where she also killed her mother in a fit of rage. It was also hinted that she purposely pushed their younger sister down the stairs, leading to her death, as well as allowed their younger brother to fall to his death from their roof. Ultimately, Feral betrayed X-Force and became the enemy of her former teammates when she was convinced to join the terrorist group known as the Mutant Liberation Front,X-Force #28. Marvel Comics. although her alliances would continue to shift.
