@/ Destinee- let's do this!! I will do my best to be harsh, but I'm in a great mood today, so I guess I'll have to play some Ruelle to infuse my bloodstream with Edgy. Okay, top down…
(note before we get going: I don't recall if you said you did the art for Marie or not, but WOAH is that art for Ruuben AMAZING!!! Was it you???? It's so impressive!! And she's beautiful!!)
WOW. This is a maddeningly well-developed character, so I'm going to have to work REALLY hard here. Fair warning: these critiques may be tiny things, or they may be irrelevant since they're based in wording on the sheet versus your image of Ruuben. But I'll do my best!!
The most major issue I see in Ruuben's character sheet is the conflict between her spoiled upbringing and her exhausting decorum. She's constantly trying to prove herself as a good princess, but at the same time, she's been raised in an environment that serves her every whim. While some of the nobility may look down upon her, I would assume her expansive staff gave her a sense of superiority. As she struggles with how others perceive her as she grows, I would expect some of that to come out–as in, she'd pull rank a LOT, reminding people that they are below her, not the other way around. It could EASILY be a phase that she grows out of once she matures and realizes that treating others as they've treated her solves nothing. But I am a little surprised that I don't see even a hint of that in her sheet.
Pulling rank could also be a quick and easy outlet for her pent-up aggression. Looming over anyone who happened to spark her suppressed emotions well would be a PERFECT way to work through her anger. You said she can become very vengeful–this is where I'd expect to see it. And as a bonus, this could be a kind of pseudo-self-confidence–acting like you're self-assured because you're 'so much better than all of them,' when really, you're distrustful and self-deprecating. Just… given a lot of what I'm reading here, I'm REALLY surprised there isn't more elaboration on her hostility.
Also, I wish I could see more of Ruuben's joking, always-laughing self here!! I feel like she doesn't get to express herself often, and that's why it's not all over the sheet, but it's still part of her! What kind of people make her more comfortable? Is it only specific people, or is there a certain trait? What kind of jokes does she make? Are they self-deprecating? Dad jokes? Crazy, Gen Z-esque humor? Are there any mannerisms that show through when she's comfortable, something that she otherwise actively suppresses?
Okay, party! time! If I'm known for ANYTHING on this site, I want it to be ~the religion rant.~ It means… so much to me. Too much. (politics is good tho!) So here it is: I feel like explaining a character's religion is weirdly revealing about their character. If they follow an organized religion, perhaps they crave structure and ritual. If it's the same one their parents followed, perhaps they care about tradition. If it's one they converted to, maybe they're the kind of person who searches for the truth endlessly–or they joined the religion as a political play. If they don't follow an organized religion, it's also helpful to specify if they're atheistic or agnostic (read up if you haven't already! it's kinda neat actually), since that can define their worldview as nihilistic or hopeful. Anyway, it's not the MOST important field on Notebook, but I feel like it's practically another Nature trait because of how much it can tell you about your characters!!
(could you… drop… seraphina's link sometime…? even if not for a critique man I just want to MEET HER. desperately. she kinda sounds like the kind of character i'd fall in love with in a tv show, since i have VERY destructive taste in women. and i've got this thing for well-written lady villains, what can I say)
Backstory is solid and honestly INSANELY interesting. The worldbuilding here is just amazing. There's only one little point of confusion: the anti-siren sentiments. It's written like they just arose when Cloelia started getting popular, but how does that work? From what I'm scraping together, one mistress would have to be queen anyway. So why did everyone hate Cloelia enough to basically found a brand-new flavor of racism? Or was this a sentiment that was revived, not created, by the prospect of having a siren queen? I'm just ever so slightly lost.
Also, I have to say, committing a secret murder as a child is kind of a big deal. How did this affect her? Since it was so long ago, I wouldn't expect HUGE impacts on the Nature page, but I think it could be beneficial to explain how she reacted to the idea that she killed someone.
"Twin Sacred Beasts" YOUR WORLDBUILDING. OH MY GOD I JUST–
it's so good!!!!!!!!!
And that is all I have!! Seriously, you have an AMAZING character here. She's clearly well-developed, and I had a really hard time being harsh!! But in any case, I hope the notes I could come up with are helpful in some way. :D