From what I know the first prince is the king nephew and not son
The bitch cheated on the king with his brother
The first prince poisoned Carlyle and the king at some point and he get exiled but I read those spoilers long time ago so it’s kinda blurry but I know for sure that the first prince doesn’t die
spoiler:
Lizena makes 1st prince give Carlyle poisoned sweets (I think. I can’t remember the food) BUT 1st prince didn’t know. It’s actually really sad because 1st prince really likes Carlyle and sees him as a little brother :( so he feels extremely bad after and basically steps down (1st prince is actually a victim too I feel bad he just wanted a loving family). Anyways, even though he didn’t know he gets exiled to live as a lesser noble. He agrees easily because he Knows what his mother did was wrong :(
do they kill the first prince? I hope nothing bad happens to him ╥﹏╥ he is just a child who just happened to have a power/bloody thisty bitvh of a mom ;(