In this situation, Dean would likely develop a greater sense of responsibility. He's used to looking out for Sam, but a baby is a whole different level. He might start to think more about the future and how to create a safe world for the baby to grow up in. He could also become more empathetic towards the idea of family and what it truly means. His character would grow from a hunter who is mainly focused on the present task to someone who is planning for the long - term well - being of his new family member.
Dean would become more protective. His tough - guy exterior would soften as he takes care of the baby. He'd be more cautious in his hunts, not wanting to leave the baby unprotected.
Dean would probably become more patient. Babies can be unpredictable and require a lot of attention. He'd have to learn to deal with the baby's needs, like feeding, changing diapers, etc. This would force him to slow down and be more nurturing. His view of life would also change. Instead of just seeing the world in terms of hunting monsters, he'd start to see it as a place where his baby can grow and have a normal life, which would make him strive to make the world a better place.
Often, his relationships with other characters change. His bond with Sam might be affected as he gets closer to the angels. He might also make new friends or enemies among the angelic ranks, which forces him to grow and adapt in different ways than he did as just a hunter.
Their relationship would likely become more complex. John would probably feel a stronger sense of protectiveness towards Dean. He might also feel guilty for not being able to prevent whatever caused the mpreg. Dean, on the other hand, might become more dependent on John in some ways, which is a big change from their usual dynamic.
Dean's character develops in terms of his relationships too. He might form unexpected bonds with characters in the French Mistake world. This could make him more open - minded. For example, he could befriend an actor who has a completely different lifestyle from his own, and through this friendship, he grows as a person. He also might gain a new perspective on his own life and his role in the real Supernatural world.
His complex personality. He can be tough as nails on the outside, but he has a soft heart. Fanfiction writers love to explore this contrast, showing his vulnerability when he's alone or dealing with personal issues.
Dean could get some new ideas about how to deal with the challenges they face. The fanfiction might offer creative solutions to their problems. He might also start to notice little details about Castiel that he hadn't paid much attention to before, like the way he looks at him or the things he says, which could change their relationship dynamic in a positive way.
Dean's driving can be a way to show his restlessness. Sometimes he just gets in the car and drives without a clear destination, which could be a sign that he's trying to run away from his inner demons or difficult situations. He might drive for hours, lost in his thoughts, which gives an insight into his complex and often troubled mind.
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.
He could develop new interests and skills. Since he's in a different family environment, he might be exposed to different hobbies or magical studies. For instance, if Dean's family has a tradition of potion - making in a unique way, Harry could pick up on that and become quite proficient, which would also boost his confidence.
They could start off seeing the baby as just another supernatural problem to deal with. However, as the baby shows signs of innocence and dependence on them, they gradually become more attached. Sam might start reading bedtime stories to the baby, and Dean would teach it basic self - defense skills as it grows older. Their relationship would be a mix of love, protectiveness, and the responsibility of guiding this powerful being.
Dean in Supernatural fanfiction is often depicted in various ways. He can be shown as a fearless hunter, always ready to face the supernatural threats. Writers may focus on his relationships with other characters like Sam, Cas or Bobby. His loyalty and his sense of humor are also common traits that are explored in fanfiction.