The characters' reactions would be a mix of concern and confusion. They'd have to adapt quickly. Grover might use his nature - related abilities to find things that could help baby Annabeth, like special herbs or plants that could potentially reverse the transformation. And they'd all have to work together, just like they always do in tough situations.
Percy would probably be very protective. He'd be constantly worried about her safety and would do everything he could to keep her out of harm's way.
Stoick would be quite surprised and a bit worried. As a father, he'd take on the responsibility of caring for his baby son. He might be a bit clumsy at first, not used to dealing with a baby again. The other Vikings would have mixed reactions. Some might find it funny, while others would be more concerned about how to reverse the situation and get their leader back to normal.
Toothless would be extremely confused yet instinctively protective. He would curl around Hiccup to keep him safe from any potential threats. Astrid would be a mix of emotions. She would be worried about Hiccup's well - being and also frustrated that she can't communicate with him in the normal way. The other Vikings would have diverse reactions. The ones who were skeptical of Hiccup's dragon - friendly ways before might see this as a sign that his ideas were wrong all along. However, those who trusted Hiccup would try to support him in this strange new situation. They might start looking for any magical items or wise people in the village who could help reverse the transformation.
Zazu would be flustered. He's used to reporting to the grown - up Simba and giving advice. With Simba as a baby, he would be at a loss for a while. He would try to maintain order in the pride but would also be constantly worried about Simba's safety. The hyenas, if they got wind of this, would see it as a chance to cause chaos. They might try to attack the pride while they think Simba is vulnerable. But the pride, united by their love for Simba (even in his baby form), would be ready to defend their king and their territory.
Grover would probably be really excited. He might bring all kinds of nature - related gifts for the baby, like a special plant that has protective powers. He would also be very protective of the baby, using his nature senses to detect any danger.
Perhaps in the fanfiction, Annabeth turning into a baby could be part of a magical curse. Her friends would then embark on a quest to find the antidote. Along the way, baby Annabeth could display some of her old characteristics in a cute, baby - like way. For instance, she might still show an interest in architecture by babbling when she sees grand buildings.
Jason and Piper would be very supportive. They'd offer their help, like babysitting or providing resources. Piper might use her charm - speak ability to soothe the baby when it's fussy, and Jason could use his leadership skills to help Percy and Annabeth make important decisions about the baby's future.
The ninja in the village, like Kakashi, would need to figure out how to handle this situation. They would have to ensure Naruto's safety while also trying to find a way to reverse the transformation. They might also have to deal with any potential threats that come as a result of Naruto's new form. For example, if other villages heard about it, they could try to take advantage of the situation.
Nagisa's best friend might be really surprised at first. But then, being a true friend, would support Nagisa through this strange change. They would probably help Nagisa with things like choosing girl - appropriate clothes or dealing with any mean comments from other students.
Riku would probably be really confused at first. He might act a bit awkward around Sora, not sure how to treat this new female version of his friend. Kairi, on the other hand, could be more empathetic. She would likely help Sora adjust to being a girl, like teaching her about makeup or different hairstyles if that's relevant in the story's world.
The other gumballs in the gumball machine might be very confused. They've never seen such a thing happen before. Some might be scared and think it's some sort of curse. The humans who find the girl - gumball could be initially shocked. But some kind - hearted ones might take her in and try to help her adjust. If there are any pets in the story, they might sniff her curiously, not really understanding what she is but sensing that she's different.