Stanley Jones's Links
Billy is like a son to Stanley. One of Frank Blair's friends from the military, Stanley stuck around by his side as a family friend and watched Billy grow up into the person he is today. He'd do anything for Billy, even if it meant cutting off his own leg.
Billy sees Stanley as something like an uncle, because the Joneses were close family friends when he was growing up, though they aren't actually related. He has always adored Stanley and trusts him deeply.