Rose Palace Headcanon, I guess
Let’s say the royal family of elves has three children. Chloris, a day elf, his goth brother who is a night elf, and then a daughter. A third child, who unlike most elves is not bound to a specific time of day, but holds power in both day and night. Her unique position means she is expected to act as a messenger, a diplomat, carrying grievances from one group to the other, but never truly feeling at home in either. She’s a child in between, most comfortable during twilight or dawn.
Chloris adores his sister, and she idolizes him. And why should’t she? He’s the golden child, the future king, and her caring big brother. At first, she tries her hardest to do her duty flawlessly, just like Chloris does. But eventually, her responsibilities begin to chafe. She has power over two worlds, and yet all day and all night, she’s expected to be available to hear whatever grievances an elf has, and try to find a solution. Never allowed to explore the boundaries of the forest, to see what wonders day and night hold, to understand her place in them, as the Princess-In-Between… She starts to resent her familial responsibilities, and whenever she thinks she can get away with it, she sneaks away to explore.
At some point, she runs into a group of Kindred. Beings between life and death, existing in twilight, just like her. For the first time in her life, she believes she’s found people that actually, truly understands what it’s like to be her. She befriends them, and they introduce her to their leader, Cardis.
Cardis, who sort of has a thing for luring young, pretty girls from prestigious families away from their destinies and into her fold.
She doesn’t think she will be able to trick the elf princess into taking her contract and becoming a Kindred; her own power is too strong, and as an elf she is already immortal. Instead, Cardis decides to befriend the princess, and show her what a life outside of the elves’ forest could mean.
Soon, she is comfortable enough around the Kindred for her to accept Cardis’ invitation into the Netherworld; the space between realms where the Kindred take shelter. Neither here nor there, it’s not bound by usual laws, much like the Princess herself. The Princess is absolutely enthralled by the endless possibilities of the Netherworld. Passion, lust, greed, indulgence… all are things that elf culture considers frivolous and shameful to devote oneself to, yet the Princess can’t find it in herself to turn down when offered. The magic of the Netherworld is like a drug, addictive and compelling, and ever very chance she gets, she sneaks off to the in-between realm. When the Kindred leader thinks she has the elf Princess hooked, she offers her the chance to drink from her goblet and bind herself to the Netherworld forever.
But the Elf Princess hesitates; she still loves her family, and despite her complicated relationship with it, the forest is her home. She says she has to think about it, and leaves.
Chloris has, by this point, noticed her strange behavior and unexplained disappearances, and is determined to get to the bottom of it. So when he notices she’s gone again, and isn’t particularly busy at the moment, he decides to wait for her return and then order her to tell him the secret of her absences. When she does get back, she seems troubled by something, but before he can ask her about it, he notices wounds on her neck that mean she’s been with a Kindred. He’s furious; the elves consider the Kindred scum—wretched creatures, not even worthy of being deemed their enemies. He goes off, telling her she’s betrayed their family, their people, his faith in her.
She’s crushed by his words. She tries to explain why she needed them, why she needed friends who understood her and a place where she belonged, but he doesn’t want to listen. Chloris tells her that he will be informing their parents of her delinquent behavior, that she will be punished accordingly, and forbidden from seeing the Kindred again.
And that’s what it takes for the Princess to realize that she no longer wants her life in the forest. Before anyone can stop her, she flees again. By now, she knows her way into the Netherworld by heart, and before any elf can catch up to her, she’s back in Cardis’ embrace, accepting her offer to live in the Netherworld, and drinking from the Kindred’s goblet to sever her connection to the elves’ forest The former Elf Princess constructs a new image for herself, uses her unlimited magic in the Netherworld to create a splendid, underground palace that attracts treasure hunters for her to play with, and has a grand old time with all her Kindred buddies, and just trying not to think too much about what she’s left behind.
Naturally Chloris blames himself, and carries the soul-crushing guilt of having driven away his precious little sister with him forever!