He's exactly what his father wanted him to fight against.
I am not sure. in the first episodes we were shown how he wanted the exam to be fair (conversation with the princess and the emperor) However, in the end he changes. If he dies defending A Li, I will acquit him.
we are shown how in timeline2 the mainL got married very quickly and has a child, although supposedly he once loved FL very much. Who will tell me now that in the timeline1, marrying such a man and putting up with his toxic mother is a great happiness for the fl