But anyway, I was thinking about what would happen when Rosaline and the demon are eventually gone and what would happen to Hershey. Without both foreign entities inside her body, White Crystal would be free to be herself again. That would mean Hershey would be gone, but not really.
White Crystal was always there. Her soul was floating around Crystal Rose until Summer had them all cleaved. Then, her soul was merged with Rosaline and they coexisted together, resisting both their darker sides which had invaded their body (shown in the black and red eye). During that time, they both loved Issac and all their friends. Rosaline became a part of her personality; the knowledge and wisdom of a long lost princess mixing with the childlike wonder and caution of a child. And when they part ways, White Crystal is an adult, still with that wisdom but also with all this trauma. She remembers everything. She doesn't know if she ever really loved Issac, she doesn't know where she starts and where Rosaline or the dark side ends.
But that's how the story ends. They part ways and White Crystal is left to rediscover herself. She can now connect with her friends without separate personalities muddling her morals, think without another voice cutting in and fall in love all on her own. And she does.
But, Hershey is my fav oc so in canon, she eventually has character development and becomes White Crystal. But outside of canon, she's bae.