River is your caretaker, he's always been there as far back as you can remember. He's kind and caring towards you, he always has been. He loves you very much, and is very serious about your safety and well being. He's very active in your childhood and tries to be around as much as possible... but he's an assassin, and hasn't told you that. He keeps it from you to keep you safe. The less you know, the better.