Well, one possibility is that he could be taken in by a kind family. They might not know who he really is and just think he's an ordinary baby. They would care for him, feed him warm milk, and keep him cozy in a little crib. As he grows up, he might start to show signs of his magical powers, like making little ice crystals form on his crib railing when he's excited or sad.
He could also end up in a magical place full of other mythical creatures as a baby. The other creatures would be curious about this strange little being. Some might be afraid, thinking he could bring an unexpected winter to their land. But others, like the friendly sprites, would play with him, and as he grows, he would learn from them how to control his powers better in this new form.
Well, one possibility is that the Guardians will immediately start a search party. North, with his knowledge of all the hidden corners of the world, would lead the way. They might find some clues in the form of ice crystals that Jack unknowingly left behind during the kidnapping. Another thing could be that Pitch tries to turn Jack to his side by showing him the 'dark side' of things, like how humans can be cruel and ungrateful. But Jack, being the positive spirit he is, would resist Pitch's temptations.
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.
It's possible that his powers would be more erratic. As a baby, he doesn't have the control he has as an adult. So, his ice - making abilities might go off randomly. For example, he could accidentally freeze the water in a nearby pond just by being near it while having a little tantrum. But as he grows and learns about his powers again, he would start to gain more control over them.
One idea could be that Jack Frost turns into a human to experience the warmth of human emotions. He might find himself in a small town during winter. As a human, he discovers the joy of a hot drink on a cold day, something he never truly understood as a spirit. He could also fall in love with a local girl who is kind - hearted and loves the winter. This newfound love makes him question whether he wants to return to his former state or stay human forever.
Well, one possibility is that Naruto would be extremely protective. He has always cared for Hinata in some way, and with her as a baby, he'd likely take on a very nurturing role. Maybe he'd try to find a way to turn her back, or he'd just enjoy taking care of her like she was his own little sister or something. He could introduce her to all his friends in the village as his 'new little friend' and they'd all be super curious about how this happened.
In terms of the story's development, it could lead to a whole new arc. Naruto's transformation into a baby girl could be a sign of a greater threat to the ninja world. It might be related to some ancient curse or a new enemy's plot. And as he tries to figure out how to turn back, he would have to rely on his friends and his own inner strength in a different way than before.
Well, one possibility is that the other superheroes would have to take care of him. They might be really confused at first. Iron Man could be trying to figure out how to reverse the situation with his high - tech gadgets. Captain America would probably be more focused on protecting the baby Spider - Man from any potential threats.
Obviously, Jack Frost is the main character as the story is about his transformation into a dark version of himself. But there could also be other characters from the original Jack Frost lore, such as the Guardians like North, Bunny, and Tooth. They would likely play important roles, either trying to save Jack from his dark path or being forced to oppose him if he becomes too dangerous.
Perhaps in this form, Jack Frost is befriended by a young human child. The child doesn't realize he's Jack Frost and just thinks he's a really cool and strange little animal. They go on adventures together in the winter wonderland, with Jack Frost using his powers in small, unnoticeable ways at first.
Perhaps Jack Frost would initially be seen as a threat by the Avengers. After all, he has the power to control ice and snow, which could be misinterpreted. But then they realize he's on their side and they start to learn from each other. The Avengers could learn about the magic behind Jack Frost's powers, and Jack Frost could learn about teamwork from the Avengers.