
A lot of people here are reminding others that the prince in this timeline isn't the same as the prince in the previous timeline. Which is true, because it's not fair to base people on who they might become in the future. But also, I would like to extend that to princess azuela.
She is also just a child here. Even though she is committing awful deeds now, and will surely be written off as an irredeemable villain from birth, she is only acting on her mother's word.
She's far too young to understand that her mother's words are false. Especially because she's been taught not trust anyone but her mother.
Just food for thought.

WEAK!!!
"OH M Geee! You chose the delusion of me over the real me!!!
"This somehow makes you super romantic for some reason! And now I'll realize I love you and that I've been neglecting you all this time!" Yada Yada
I'm being a winey b*tch about this. I'm just getting tired of shitty contrived romance in what's clearly not a iseki revenge plot (〜 ̄△ ̄)〜

FL: Let’s use magic to make waterproof paper
Girl: Oh my God! You're a genius!!!
Everyone before: Hey we have this magic that can preserve things can we use it to make waterproof paper, a prevalent problem that has plagued many for centuries?
Someone else: No you need to wait for the protagonist to invent that
Everyone before: What the f*ck does that mean?!

Ig most people just dont need waterproof paper. In our age, if we need to preserve paper, we can laminate it. Most of the time people just use online documents and print everything so even if it does get ruined, it can be reprinted so having water proof paper would just be useless and a waste of money for us. I mean even if it was waterproof, that doesnt make it fireproof or rip proof so in the end, it has no real use besides saving some effort or preventing it from weathering.

"How are they all connected to flowers? There's no way it's just a coincidence!"
Ma'am it is a very universal thing in these stories for the main to be connected to the main houses and for those houses to be themed behind something.(i.e. flowers, gems, animals, weapons, and even the four seasons)
Also *SPOILER ALERT* for a theory I have...
I'm pretty sure she's the surviving member of the blue rose house and he isn't her real brother
Oh, he's gonna say some sh*t like "It was my decision that you two would marry. The prince has no authority in these matters."
A**hole!