"Previous experience? I used to be a cop and it's probably better for all concerned if that's all you know and all I tell you." - Izzy, during a job interview.
Izanami "Izzy" Mikoto was born to a corporate family working in a Mars research arcopolis near Mons Olympus. Her father was a geneticist for the <Corporation>, while her mother ran security for the same company...because of obsessiveness and covert nature that went along with being a geneticist of her father's skill, Izanami spent most of her youth being raised by her mother (as well as her mother's security team).
Brilliant and observant, Izzy quickly picked up on the skillsets that witnessed amongst the security team. As she got a little older, she began taking lessons in hand-to-hand combat from the team's instructor...a little older beyond that, and she began training in pistolwork with her mother. When she had reached the age of 13, she had even memorized almost all of the security procedures and had begun picking up on the more tactical aspects of the job, gaining herself the title of "Security's Unofficial Junior Member".
A week after her 17th birthday, she got permission to move out from the research arcology and move to the Mars Prime colony to attend the police academy there. At first she had trouble adjusting to the differing rules and regulations (her mother's arcology was out of the way after all and she could afford to be a little lax on the law), as well as some attention issues with the courses and classes given that she already had the training and knowledge that the others in her group were learning. Soon enough though, she had gotten past the boring parts she already knew, and began learning new things that she didn't. An investigative and curious learner, backed up by the genius she inherited from her parents, Izzy graduated in the top 5% of her class.
Among the honour and glory of achieving such a result, it also gained her the attention of her superiors, some of which began scouting her for the possibility of advanced training and assignment to the elite Special Police Assault Rescue Retrieval Operations Wing, or SPARROW. After she completed her first 2 years as a regular united council security officer, a SPARROW recruiter approached her and made the offer. Always craving a challenge for her body and mind, Izzy accepted. After completing the advanced training and battery of tests, Izzy was assigned as a full combat operator to SPARROW's 7th Squad, operating out of Luna's spaceports.
As a SPARROW, Izzy spent most of her time raiding suspect vessels or backing up the regular police during high-threat-possibility situations. Real special ops experience was few and far between, but they did happen. In her month on the job, her first real SPARROW op began when a local businessman was kidnapped and held hostage for ransom by a heavilly armed group calling itself "Free Luna". Izzy got point on the breach and insertion team and carried out the rescue op in under 20 seconds, with 80% of the Free Lunites dead, and the remaining 20% incapacitated and arrested for questioning. Though commended on her speed and precision, Izzy also got a warning for engaging a suspect in melee, when it would've been more prudent just to shoot him. Melee take-downs became something of a recurring theme for Izzy's up-close-and-personal tactics, only stopping after she got her first official reprimand for doing the same thing on 10 separate occasions, including the Free Luna incident.
Despite her reprimand, Izzy was made squad leader and promoted to Lieutenant after she busted a series of small smuggling operation running out of the spaceport that was smuggling weapons and supplies to the religious terrorists on the Elysium colony. She would have 3 more separate run ins with the Elysium terrorists, including one failed revenge assassination attempt on her life, after one of the group's members that she jailed had escaped and tracked her back down (a rather impressive feat, considering the security and secrecy surrounding UC police special forces).
Because of this list of experience, Izzy's squad was shipped out for a brief stint on Elysium, after the colony's governor declared martial law. There, Izzy led assaults on strongholds (both suspected and confirmed), tracked down/eliminated key suspects, and assisted in the search for the bio-weapons that initiated the martial law state. After a month, her team was sent back to Luna as the bulk of the Earth forces arrived.
Things settled down in Luna, as Izzy's squad got back to the everday grind of spaceport tactical security. With most groups going underground because of the crackdown on Elysium, things became very quiet.
This quiet was broken a few weeks later, when government officials and influential scientists on Luna started showing up dead. Do to the dangerous situation, SPARROW was assigned to investigate which put Izzy's squad hot on the trail of what they believed to be a single suspect, a serial killer who had committed similar targeted acts of murder on 2 other planets. As the investigation went on, Izzy discovered a common link to her past...all the targeted individuals worked, or at one time, had worked, for the corporation at had worked out of the Research Arcology where she was born and grew up. This was futher confirmed after Izzy's squad breached into a suspected hideout for the killer, and found travel documents showing that the suspect had just left for Mars and also a target list with her father's name listed near the top.
For the first time since graduating from the Academy, Izzy made an emotional-driven decision and moved her team from Luna to Mars, even if it skirted the lines of her orders and areas of operation. There, they uncovered a clue that pointed them towards an old section of the Arcology that had been shut down for repairs for three weeks. Her team breached the old section and split up to cover the winding corridors and halls quickly, before the suspect could escape again.
It might've worked, if the suspect had any intention of escaping. Instead, the clue, and the old section were trap...forcing the team to separate so he could take out each member, one by one. Izzy's computer specialist was the first to go, causing a communications breakdown. Then her heavy weapons specialist, then her sniper, and so forth. Izzy pushed on even faster, as each of the mortal screams from her team members cried out through the abandoned hallways...and then she stopped, as everything went silent.
It was then that the trap against Izzy was sprung, for as she walked around the corner she caught sight of the suspect's shadow holding a detonator for an old earth style nail bomb in his hands.
There was an explosion, and Izzy woke up a week later in a Mars Prime medical facility. The killer had apparently died in the explosion, and Izzy was facing negligent charges for disobeying orders and getting her team killed. Had she died, she might have been honoured instead.
She was dishonourably discharged from SPARROW the moment her injuries were healed. With little experience in anything else, Izzy did what many ex-cops did after being discharged. She went mercenary, contracting herself out to anyone with the money to pay for her services. To avoid complications with SPARROW (after all, they knew that she was intimately familiar the goings on of the organization and could be a potential security risk) and also to give herself a distance from Mars, she took most of her work away from the main reach of the UC, preferring to stick to the fringes of society and the outer colonies.
As such, Izzy soon found herself being hired to work security on a out of the way mining station near Saturn.