There are few true heroes in Game of Thrones. Each person has their own perspective, which they perceive as the right one, and only the person who sits on the throne has the power to turn their personal opinion into the objective ethical truth of the land. Every character plays the game, and none are immune to the corruption it breeds within them. However, some are able to muster up the inner strength to rise above their circumstances to make a positive change.
Source：https://www.cbr.com/got-greatest-redemption-arcs/
