that is actually the 1 prince idea. he was obsess with Meridian but when Meridian turn him down, he scheme to get them married and killed. (i need to reread to remember, lol)
in their childhood, Demetrius found her crying. they be friend each other.He promise her to marry and love her (she thought her parent don't love her). but later, when he saw her again, it was when her power run amok for the first time(if not mistaken, she tries to imitated her father magic that created flower).Since he is still a child, his magic was not that powerful that it taken a toll on him and caused him to run a fever till he gone back*
*edited caused i was mistaken, demetrius return home not her