@Shirokamisama
About the choices, he chose to kill that girl with glasses at the carriage, she did nothing wrong, she would become a cruel and evil leader, but she did nothing wrong up to that point, he does not needed to kill her like that, that was morally incorrect imo.
About the Queen and the corrupted princess, they were killing innocent people, worshiping Satan, and they invited demons to the kingdom, they were catch doing the act, now about the other corrupt nobles, the hero also had proof about their crimes and corruption, those executions were all correct.
Marring the last princes with the one that executed her family was cruel, but was also the only way to show that she was not corrupt and sided with justice, she would live her entire life being suspected of being a satan worshiper as well, so that was her only way out to have a decent life