She was abandoned as a newborn child, left at the doorstep of a small academy for gifted people, for unknown reasons. The headmistress of this institute was known by her kind and gentle heart, (compared to her co-workers,) she couldn't have a child of her own by a genetic problem, so she took baby Amber in her care, giving the baby this name, and her own last name, Frost. Twelve years passed by with no major occurrence in Amber's life, until she started to show the signs of a developing ability, and was immediately enrolled in the academy her adoptive mother was headmistress of, receiving intensive training and education respecting her own ability to control electricity, her own character was also forget by the ruthless and often immoral tests she was submitted to, often with the motto "Suceed or die," this practices were, for obvious reasons, kept hidden for the public, and included deflecting metallic projectiles in time, or being hit by them, breaking a bone or two, fighting other students, often resulting in severe injuries, and similar exercises of brutality. This made her used to blood and pain, and caused her innocent character to fall back into a cold and detached attitude, destroying her childish morals, and providing her with a crude view of the world, a fitting personality for a DSE agent-to-be, which was the future her tutor had planned for her; Amber had no choice in the matter at all.
She was graduated at age 17, younger than most of the other students, but she showed remarkable intelligence, and the potential to discover practical appliances of her ability, not to mention incredible perseverance. In truth, she was never free, for she was enrolled into the DSE as soon as she got out of the academy, and ascended to the rank of Special Agent In Charge at age 19. Her methods, though effective at capturing and bringing criminals to justice, were often frowned upon by her superiors, due to the extreme brutality she used on her targets, often delivering them with missing limbs, or simply brain-dead by an electrical shock. Her signature move, the Coilgun, was incredibly popular amongst the general population of New York, the city she was assigned in, and soon she would become the public face of the DSE, appearing in many advertisements, recruitment posters, and others, the brutality in which she conducted herself always kept hidden. She is now a prominent agent, but her methods seem to have put her in a tough position, due to her effectiveness, firing her would prove a rather stupid course of action, but due to her brutality, further promoting seems unlikely.
As of 2012, she is "enjoying" her recently-obtained rank, but it doesn't really affect her everyday life, since her commanding skills are basically null, not to mention her teamwork.