Alistair was an only child, born into an influential family, one with a mighty reputation, due to this, his parents put a lot of pressure onto him to live up to his family name, they strictly monitored him, never letting him be an individual.
Growing up, he never had freedom, after a while he couldn't take it anymore , so, at the age of 16, he ran, none of his family tried to stop him, thinking he'd just come back... he never did. He kept running, going from town to town, even though he travelled alone, he was never scared, he saw it as freeing. Now, he continues doing this, staying away from people, in fear that they'll be like his family.