I'm Doctor. 

I am the last lord of the time. The approaching storm.
I travel for time and space on my time machine, T.A.R.D.I.S.
I came from Gallifrey, a planet that no longer exists was destroyed during the last Time War, between the lords of time and the Daleks.
As I said I am the last. 
What remains of the Lords of time. 
I spent my long days saving peoples and planets through the universe.

(Other account: @HannaSmith3113)