NOTE: SOME SPOILERS UP THROUGH THE END OF SEASON SEVEN INCLUDED
Background
Her father was a career diplomat, Ros was born in Mogadishu, Somalia, and lived most of her life away from England, schooled wherever her father was stationed. Ros put her father on a pedestal, when he told her she was a frightened child, she made up her mind to never be scared of anything again. Ros excelled in languages, politics and debate, studying Arabic at Oxford, but is fluent in Russian, French, Spanish and has a smattering of others.
After Oxford, Ros went to work for MI-6. The one real criticism made during her training was that she wasn't good at taking direction. Ultimately, she excelled at MI-6, spending most of her time in Europe and the Middle East. Shortly before she started liaising with MI-5 she'd been in Baghdad, where she'd uncovered a network of informers; something that has gained her some fame throughout the service. Ros went over to MI-5 after discovering her father was in the midst of a plot to overthrow the government. It wasn't to protect democracy as she had been led to believe, but because of ego and personal enrichment. Knocked off the pedastel she'd put him on, her relationship with him would never recover.
Ros' time at MI-5 didn't start well. She had little trust for those she worked with, and vice-versa. In her first operation she made a bad call, leading to the death of an innocent civilian and Ros blackmailed Jo so she wouldn't tell Adam the truth about it. When another team member was under suspicion, Ros worked against the team to bring her in, though once it was proven that Ruth was not guilty Ros worked with the team to help her get away. She never apologised, never considering her earlier actions anything but justified.
While she had a rocky start at MI5, Ros undertook a number of operations at great personal risk to herself, to save the other members of her team. She rescued Adam from a botched operation at the Thames barrier in which they almost both died, and stayed in a hostage situation with no outside contact to try and diffuse the situation. When Zaf disappeared, Ros wouldn't give him up as dead.
After torture she turned on her team, providing information on them to a secret organization that was working against the interests of the British Government. Her death was faked by Adam and Harry, and she escaped. Unknown to the rest of the team, she spent a year in Russia working covertly for Harry Pearce. She was recalled abruptly, her cover blown, and after Adam's death took over as the leader of Section D. It is from the end of this season, after Harry disappears, that she is sent to away under 'examination'.
Personality
If Ros Myers were to be summed up in a single word, it would be capable...the sort to get things done, when they need to be done. Ros is willing to make difficult decisions that others shy away from and once the course of action is planned, follow it through to its conclusion, without worry or concern about moral implications.
Ros is good at what she does, and she knows it. This isn't to say that she's infallible; she knows that she can be wrong but in her line of work you can't afford doubt. The job is her life.
While others would call her callous, cold, ruthless, cynical, unforgiving, Ros would say that she is practical, efficient, a realist. She would admit to being unforgiving, though she won't let it affect her work (or, at at least she thinks that she wouldn't).
Not one to trust, nor to open up, Ros doesn't have friends; she has co-workers. Friends
only get in the way, and people you love only let you down. Or so she would tell you. Things have changed and there've been a few that have managed their way under her skin. Harry Pearce, Adam Carter, Lucas North and surprisingly (to her) Jo Portman.
Truthfully, Ros isn't an easy person to like or to get on with. She doesn't particularly want to be either. Ros is proud of her nature; she likes that she is unlikable. At one point she says 'If I had wanted a job where everybody loved me, I'd have become a vet'. That sums up her attitude toward people fairly well. Life isn't about popularity or friends, though the people she knows may prove useful later in life. For her it's about her job and doing it well