Not sure why, but I imagine the Crown Prince being absolute jealous when Bellarose told him about MC, like he understands that MC's his little sister's savior, but, imagine everyday your little sister talk about someone they just met once and immediately took a like on it, how can he not be jealous🤣🤣???
So... Can we know more about the Crown Prince and the King, and their reaction upon hearing MC through Sylphina?
A little. XD But once the Crown Prince meets MC and, depending on how MC is like, he'll end up admiring them just as much as Princess Bellarosa would.
Then it'll be the king who's a little jealous... 🤣 (In an amused, fatherly way)
SO - in regards to your ask:
Crown Prince Branimir: Branimir, a.k.a 'Bran' or 'Branny', is the studious, responsible crown prince that many admire him to be. He is courteous and fair, qualities that is befitting for the royal heir. Of course, around Bellarosa, he's a lot more smiley and friendly - with the added dose of protective instincts in regards to his little sister. He doesn't know about MC as of this moment.
King Abramo V, the Fifth of his name: Known to be a fair and just ruler, King Abramo lived up to the name of his forefathers. While he was not known to create wars, he was famous for defending against them - such as aiding one of his allied kingdoms from an invasion a few years ago. He usually chooses diplomatic approaches and treaties. He tries to be involved with his kids as much as he could, especially after the death of his wife.
Both the prince and king have blond hair and white eyes with gold rings at the edge - the eyes are hereditary and proof of the royal family's blood. His many-greats-grandfather, Abramo the First, had been one of the key factors to the Void War.
When Sylphina told Abramo V about MC - including the fact MC is not from this world and they are the prophet of Grand Nature, much to the king's relief - , this was pretty much his thought process:
"Certainly, with Sylphina guiding them, it won't be a chaotic introduction."
So you can imagine how quickly that's gonna change upon realizing that MC fainted in his palace and Princess Bellarosa picked MC as her companion. XD