Ida Scott was part of the crew on Krop Tor researching the black hole known as K37 Gem 5.
This lump of rock is suspended in perpetual geo-stationary orbit around that black hole without falling in. Discuss.
History
But if this is the original, does that make it real? Does that make it the actual Devil?
Ida Scott was the science officer in the Walker Expedition and was researching the previous civilization who enabled the planet to orbit a black hole and trying to discover the power source that was holding the planet in orbit. She also accompanied the Doctor down into the pit within the planet. (DW: The Impossible Planet)
While Ida was waiting for contact from the Doctor, while sitting next to the trapdoor-entrance to the pit, she was rendered unconscious and suffered mild oxygen starvation because her oxygen supply ran out, but luckily she was rescued by the Doctor and reunited with her crew. (DW: The Satan Pit)
Personality
And yet here we are. Beyond the laws of physics.
Ida Scott is very self-confident, as she has the ability to command a ship. She acts tough and still maintains calmness and control when she learns that they will soon run out of air, with no way of escape, but pleads to the the Doctor that he mustn't go because she doesn't want to die on her own.
She also is faithful to her crew and finds it hard to believe that one of the members of her crew had attacked, and tried to kill, other members. She also becomes faithful and loyal to the Doctor and Rose and she starts to take orders from them, especially when she and the Doctor are in the pit.