The Doctor(#10)(David Tennant)
Displayed Tragic Hero Qualities
The Doctor is the an alien and does not have to interfere with the humans. It is his choice to protect and serve them.
He gets too emotionally attached with his companions. No matter how many times he has gone through loss and great suffering, he cannot help but to do it again.
Having this great power of being a Time Lord, he knows that he can save many races. He gets too caught up in trying to save everyone else that he ends up hurting himself in the long run.
Not Pure Loss:
As The Doctor get hurt because of his desire to help others, we understand that it if for a greater purpose.
Does Not Leave Audience In A State of Depression:
Through all of his journeys and adventures, you will start to feel like you really know him. This makes it sad when he dies and has to regenerate but excited to see his new face.
The Doctor (10)
This is what The Doctor named his time machine called a T.A.R.D.I.S. (Time and Relative Dimension in Space)
Clara 'Oswin' Oswald
Clara was a companion of the Doctor's. She was lost because the Doctor could not save Danny Pink(boyfriend) and Clara went with him. "It's smaller on the outside!"
The Doctor thinks he is the last Time Lord in existence... until he finds The Master who had later died in his arms refusing to regenerate. Later, he finds out that he did in deed end up regenerating as a woman that goes by the name of Missy.