The fangs sink into the horrible helpless flesh of her Abyssal-grub form--she writhes, not because she expects it to do her any good but because she lacks even the capacity to scream--
She breathes out slowly. "Plenty of books are mostly just about one race...I'm not trying to create Golarion Again: This One Doesn't Have Rovagug. It would make everything much simpler if there were just the one kind of person...well, excepting familiars and so on...I'm not opposed to archmages creating new races or whatever, but then it's their problem to design them, not mine. I just want to make something that Pharasma will allow to link up to her existing Creation and which won't be a horrible crime against everyone who lives there. Let's just do the one species and forgo the flaw. Is that okay?"
"That's fine. And--I'm not opposed to there being other kinds of people, I just..." she drums her fingers against her thigh again. "I don't want to get bogged down doing a lot of species design, and I don't want to condemn a lot of people to being--second class--because I didn't feel like personally making sure they weren't."
"I haven't actually gone through it myself. I know what will happen to you next--you'll be reborn, in your new body in your new world, and you'll start to regain your memories as a teenager--but as to what the experience of the transition is like, well, I've never met the same person again after they've been through here, and even if I did, I'm sure infantile amnesia would have claimed that memory."
...It seems sad, to never see the same person twice. Or, well, the angel has the other servants of the "Will of the Multiverse," but she's expressed enough contempt for that system that it still seems lonely.
"Alright. What's next?"
"Next is the more directly plot-focused stuff; I already explained Minions and Perks, in the general albeit mostly not specific cases, and I've mentioned Flaws; those are basically reverse perks, bad things you can take on in order to get more goodies. Although of course 'bad' and 'good' are subjective, and some people prefer some flaws to some perks. But before we get seriously into those, it would be better to explore the more broad-strokes narrative pieces of your role, your rival, your fiancee, and your fictional counterpart's bad end."
Eyeroll. Mom would never try to put Seshka in an arranged marriage. "Alright, hit me with my options."
"Your options for Role are the Royal Princess, the Duke's Daughter, and the Rich Heiress."
The Royal Princess is the daughter of the monarch of Villarosa, the highest ranking and most desired bachelorette in the nation. This confers all the obvious social dominance it implies, unless you really twist the worldbuilding around, and it doesn't provide infinite protection against the consequences of your actions."
The Duke's Daughter is the only daughter of the highest ranking noble in the nation, after the royal family; by default the 'Duke of Thorns,' though the title will change based on the cultural influences you pick for Villarosa. This is a lot like being a princess, but less so. The difference in status is made up for in that your engagement will be an important part of your relevant parent's political plans, so you can can call on their resources for aid in defending it, up to the point where it's more politically expedient to cut you loose instead."
The Rich Heiress is your sole non-noble option. She's the daughter of the wealthiest merchant-or-equivalent in the realm; not noble, but rich and prominent enough to freely move in those circles. You won't have the power of a noble title, but what you will have is money. All the money. And that's a power all of its own. But unless and until you marry the right boy, you're still technically a commoner, and your family money, like all the other nepotism powers, has a limited amount of power to protect you."
"Rich Heiress," Seshka says firmly. "I don't want to be responsible for administrating a kingdom or even a duchy or whatever, and I already shared my views on the value of money."
"The Prince Charming is a royal prince, the heir to the throne if the Princess Royal isn't, and all around nice, heroic guy. The same age or slightly older than you, talented in everything he does, and romantic enough to make all the girls swoon - including you. An overall extremely solid option, except for the fact that he's going to prefer the heroine to you. He's also the most likely to take strong offense to any bullying or nefarious tactics on your part."
The Dark Rival is essentially the dark mirror frenemy of the Prince Charming, usually close to the same age as him, and therefore you. At the start of the story, he's even more talented than Charming, but ultimately the good guy surpasses and befriends him. These kinds of rivalry-that-ends-well tropes are less prevalent in the literature you're familiar with, I think, but it's a reasonably straightforward concept. The consummate bad boy, he's liable make your knees weak and your heart beat fast. He can be mean, but never quite evil, and he's got a heart of gold deep inside just waiting for the right girl to unlock it."
The oldest of your choices, the Noble Prodigy has already graduated from the academy and made a name for himself. He is of lesser nobility, but by merit has ascended the heights of society. Your setting choices may alter his exact deeds, but by default he will have made a name for himself both as a warrior and a commander. To you he will be cold and formal at first - not cruel, not unwilling to be wed, but certainly the least emotional of your potential fiances. A tragic backstory has put walls around his heart, but he is vulnerable to having them felled by the power of True Love."