Dean would probably be very protective. He's always been the big brother looking out for Sam, and with Sam as a kid, that instinct would be even stronger. He'd be constantly worried about Sam getting hurt and would keep him close at all times.
Sam would probably be very protective. He has always been there for Dean, and now with a new addition to the family in the form of a baby, he would see it as his responsibility to keep the baby safe. He might also be a bit of a mentor, teaching the baby about the world of hunting and how to handle different supernatural creatures.
Maybe a plot twist could be that Sam's transformation into a kid is part of a larger, more sinister plan by an unknown entity. This entity could be using Sam as a child to manipulate Dean in some way, perhaps by making Dean over - protective and leading him into a trap.
Sam is more cerebral and often tries to find peaceful solutions. Negan, on the other hand, is brash and used to getting his way through force. So Sam would likely be put off by Negan's aggressive nature. Dean is protective and hot - headed. He would not tolerate Negan's threats easily. So their personalities would clash as Sam tries to reason and Dean is ready to fight against Negan's overbearing attitude.
Well, Sam would be super confused at the start. But as time goes on, he'd be more involved in Dean's life than ever. He might start to take on more of the hunting responsibilities alone while also making sure Dean is okay. Their relationship could become strained because Dean might feel useless not being able to hunt, but Sam would try his best to make Dean feel important and supported.
One great fanfiction could be where Dean and Sam have to face a unique Halloween - themed monster. Maybe a witch who uses Halloween traditions to cast powerful spells. They would have to use their wits and hunting skills to stop her before she causes chaos in a small town.
There's also 'A Hunter's Legacy'. It's set in an alternate universe where Dean and Sam face different challenges. The author does an amazing job of capturing their personalities. The story is full of twists and turns that keep you on the edge of your seat, and it really showcases the unique bond between the two brothers.
They might be really surprised. Some fanfictions could show them in situations they never thought of. For example, if there's a fanfic about them having a normal life for a while, away from hunting, they could be both amused and a bit bewildered.
Well, his friends' reactions would be complex. Annabeth would likely be in a state of disbelief at first. But then she'd start to analyze the situation, trying to figure out what caused Percy to turn into a kid and how to reverse it. Grover would be more emotional. He'd be like a big brother to Percy in this state, making sure he doesn't get into too much trouble. And the other demigod friends would probably be a bit confused, but they'd come together to support Percy and try to find a solution. They'd also have to deal with the fact that Percy's abilities and knowledge are now limited as a kid, which would change the way they work together.
One great fanfiction with this concept is 'Baby Dean's Adventures'. It has a really cute take on how the other characters deal with a baby Dean. They struggle at first but then it becomes a heartwarming story of protection and family.
It could make them see different perspectives. For instance, they might realize how others view their bond as brothers. Some fanfictions focus a great deal on their emotional connection, which could make them more aware of how important it is to each other.