It's cause he gives me the 'same-situation' vibe with the MC's situation. From his first appearance in the banquet, you could tell he's been receiving death threats from the queen and the second prince, probably since he was young. Because of surviving those threats, thus he's been portrayed as a cold blooded
killer prince... I mean common, you'll be suspicious of everyone if you've received death threats for a long time.
And so even though it's a cliche I do think she'll end up with the crown prince, or someone as cold-blooded as him--- cause every manhwa that I read likes a cold blooded looking ML. Manhwa's cliches is a hot cold-blooded looking ML. Period
Spoiler!
Thank god, she won't end up with any of those asshole brothers
Hahahahaha!!! our cute little money maker is on business mode