Wanderers of time
Through time they wander and through time they move on.
One of them being the last of his kind. A kind that seem to have become a legend to many people. He travels through time. His name he choose himself, a name, which means to help people. Not to hurt or punish but to help and heal wounds long ago cut. He travels the stars aiding those who need help and saving lives people thought were long gone. He saves many people and yet his name is all they remember him by. He opens peoples eyes to the things around them that they are missing. His companions never forget him and he never forgets them. They have become his friends and even his family. His name is the legend of the stars.
The other is a man who once could die but no longer can. He is an immortal man who travels with time. He watches as people age and he watches as times change around him and all along he's there to stop the worst from happening. He sticks around on the one planet that has become a target by so many so that he can help and protect those around him who he likes to call friends or even his family. Even if he knows it won't last forever, they'll always be with him. His name changes and his new name becomes the new legend, a legend seeming impossible.
They are the two most well known people in the universe. Their names travel from one star to another. They make seemingly impossible become possible. People would consider it a gift to be like them, others see it as something impossible or not probable. To them it's something else, something much worse, a curse.
They stand and watch as people they'd like to call family and friends, age and die and they have nobody left but themselves. Forced to make new friends and to forget the old. Those old friends never travel far though because they'll still be remembered by the very people who maybe shouldn't move on completely, but temporarily. Forced to move on for their own sakes, to put the past at rest, for now.
They have become the wanderers of time.