Well, Finn might start having a craving for blood. He could struggle with his new vampire instincts while still trying to hold on to his old heroic self. Maybe he would try to find a way to reverse the transformation at first. But then he could also discover some new powers that come with being a vampire and use them for good, like having super speed to catch bad guys more easily.
Finn's personality would probably become more brooding. The whole vampire thing is a big change, and he might start to withdraw a bit. He was always so full of energy and positive before, but now he could be more cautious and a bit more on the dark side. He might also become more territorial, like vampires tend to be.
It's also likely that Caroline discovers new and unexpected powers as a vampire. Since Klaus is an Original, there could be some unique aspects to her transformation. She might have enhanced strength or speed that surpasses normal vampires. This could lead to her becoming a target for other vampires or supernatural beings who either want to use her power or are threatened by it.
She might start to have a craving for blood, which could put her in a moral dilemma. Since she has always been a heroic character, this new urge would conflict with her values. Maybe she would try to resist it at first, seeking alternative ways to satisfy this new need without harming others, like trying to find some kind of substitute for blood.
Well, Finn could start to notice how differently people treat her as a girl. Some might be more protective, while others might underestimate her strength. This contrast in treatment could fuel her determination to prove herself.
Well, in the fanfiction, Finn could be part of a secret vampire society. He'd have to learn their rules and customs. There might be a hierarchy among the vampires, and Finn would have to find his place. Maybe he'd be a special kind of vampire with unique powers that the others envy or fear, which would create a whole lot of drama and intrigue within the vampire community.
Well, in the fanfiction, they might face a lot of challenges. Maybe their families don't support them at first. Finn could be really nervous about becoming a father, while Quinn might be more determined to make it work. They'll probably have to deal with school or work along with the pregnancy.
She might discover new magical abilities that are unique to elves. For instance, elves are very good at household magic. Hermione could use these new skills to improve the living conditions in the Gryffindor common room. She could make the furniture more comfortable or keep the room cleaner without using much effort.
Well, one possibility is that he'd have to deal with all the social norms and expectations that come with being a girl in his world. Maybe he'd be shocked by how differently people treat him. For example, his male friends might be more protective or act differently around him. Also, he could discover new things about himself, like a different sense of fashion or a newfound interest in activities typically associated with girls.
Well, if Sasuke turns into a baby in a fanfiction, one thing that could happen is that his friends would have to take care of him. Naruto, for example, might be really confused at first but then would become super protective. He'd probably try to feed Sasuke all kinds of strange foods that he likes, like ramen, not realizing that babies can't eat that yet. And Sakura would be all motherly, trying to keep Sasuke clean and making sure he's warm.
She might find love in an unexpected way. Since she's now a man, her romantic interests could shift. She could meet someone who sees her new male self in a way that she never experienced as a woman. For instance, she could fall in love with a woman who is attracted to the qualities she now has as a man.