
It's still too far for that to happen. Spoiler:
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It was during a hunting competition. Perez exchanged cloaks (or maybe armor with the Emperor) and hunted together. 1st Prince mistook Emperor for Perez and attacked him. It was a serious wound. It all comes tumbling down after that. Originally, Florentia's irritating cousin (son of Vieze - I can't remember his name) was gonna take the blame coz the weapon used was his. They managed to convince him and his family to leave Lombardi and go on an exile away from the capital. Meanwhile, coward 1st Prince made Empress the scapegoat.
Like I said, it goes tumbling down.
Spoiler
Rip emperor