Are you talking about the red hair guy? And if your talking about the red hair guy hes still the crown prince not the emperor
Ohhhhh so the original ml is not the emperor. That make sense.
Eh? But chapter 2 says that redhead's the current emperor
Well, the emperor probably never ordered the blond to kill the girl (since her family was already on his side and all...) so he may have gotten angry at the blond for doing stuff he wasn't ordered to do and taking things too far by killing even "innocent" women now (even though she probably wasn't that innocent since she tried to blackmail the blond despite the two of them being on the same side).
On top of that, the emperor and the blond guy may have started being at odds with each other when the blond guy decided that he'd just "silence" the heroine too.
But why did the emperor join hand with the original fl finding out who kill the fl? And his role was villain but in fact the most villains person is the emperor since he was the one who gives the order? But he was the ml? What?