Luis guibiern and his strange relation with the prince

Hi everyone, i've just finished Metaphor ( what a fantastic game) and now i'm sitting on some unresolved misteries that didn't solved, or perhaps it's me that didn't understand. The first one is: Luis and his research of the prince curse, I mean, the story lead you to think he is the one who cast the curse, but it was Rella, so why Luis studied the curse? And how can he studied the curse if he never saw the prince's body ? Second one is: it is stated that the king taught the prince was dead, i mean, how is this possible? One of your subordinates sneak the body of your son in the magic forest you bang his mother and you didn't know? Maybe the thing here is the king abandoned every hope of salvation for his son but it still is strange, you have litterally the most powerfull weapon in the entire empire and it cannot be used to save your child? Last one is: where did all the poor guys who drove the charadier go when Luis fusion with it? Poor guys...