@ChibKip Though I agree that the trio justice (let's call them that) were kinda of jerk, I still can understand that Mia-sama wasn't that innocent. By doing nothing, she did the most sinful act of all. As the story narrated, Mia didn't do anything to prove her innocent and acted indifferent. And I think,at some point, the trio had a confrontation or two with her, but she didn't care. As the knight/attendant said, Mia is the Imperial Princess who is standing above all. And as a royal, she has duty to her citizens. By being ignorant and indifferent, she had allowed greedy and villainous nobles to do whatever they wanted and make the citizens suffered and destroyed the empire.
Fortunately, in Mia's second life, she acted to preserve her life, doing things that moved the heart of many people and shifted the tide of fate even though many misunderstood her self-interest as saintly action.