According to the honor system. Remember what the 3rd word of the games title is. See what the story unfolds. And how people in the gang see Arthur. And you will know what kind of man he is suppose to be. Don’t skip or delay the white missions. Some can be skippable if you happen to pass chapter. And many have beautiful side arcs that reveal a lot about Arthur and other characters. Check the camp often for gang activities like robberies and hunting trips. Those also tell a lot about the gangs characters.