Blair would probably be initially shocked and a bit judgmental. But deep down, she'd be there for Serena. She might try to control the situation at first, like making sure the news doesn't spread too far too fast. Nate would be supportive in a more laid - back way, while Chuck might offer some practical advice, although he'd also be a bit cynical about the whole situation.
Her friends' reactions would be quite diverse. Blair, being Serena's closest friend, would have a complex reaction. On one hand, she'd be worried about Serena's future and how this would affect their social standing. But on the other hand, she'd feel a sense of loyalty and start to plan how to protect Serena. Nate, who has always had a soft spot for Serena, would be immediately supportive and offer a shoulder to cry on. Chuck, with his more worldly and sometimes cold view, might see it as another scandal to manage or use to his advantage, but eventually he'd come around to help because of their long - standing friendship.
Blair would probably be a mix of shocked and a bit jealous. She has always had a complex relationship with Serena and Nate, and this new development would surely stir up her emotions. Chuck might see it as an opportunity to manipulate the situation for his own gain or use it to taunt Nate. Dan would likely be judgmental at first, but then he might come around and offer some practical advice. Jenny could be either excited or use it as a way to gain more popularity in the Upper East Side drama.
Some of their Pokémon friends might also show unique reactions. Pikachu could be very protective of Serena, always staying close by to make sure she's okay. And their other Pokémon might bring little gifts like berries or shiny stones they find, as if they understand what's going on. The more mischievous Pokémon might play little pranks that end up being endearing in the context of the pregnancy, like stealing Serena's hat and then replacing it with a flower crown as a sign of celebration.
Often in these fanfictions, Serena and Dan's pregnancy can lead to different story arcs. Maybe they decide to keep the baby and start building a more stable life. Or there could be drama if one of them has doubts about their relationship at this new stage. Fanfic writers may also play with the idea of how their friends, like Blair or Nate, interact with them during this time.
In some fanfictions, the pregnancy could be a planned event. Serena and Dan are finally in a good place in their relationship and decide they're ready for a family. But then they face external challenges like financial issues or interference from other characters who don't want them to be together. This shows how they fight for their relationship and their future family against all odds.
It could be Dan. Since they had a long - standing relationship in the show, it's not a stretch to imagine that they had a moment that led to Serena getting pregnant. Their relationship was always full of drama and passion, so this would add another layer to their story.
Serena could be a bit shy at first. She might blush deeply and look down for a moment. But then, she would look into Ash's eyes with love and admiration. She would tell Ash how much she loves him and how she has been hoping for this moment. She would accept his proposal gracefully, and they would share a tender embrace while their Pokémon friends cheer around them.
One interesting plot twist could be that Serena discovers she's pregnant but isn't sure who the father is among her many suitors. It could add a lot of drama as she tries to figure it out without ruining her reputation. Another could be that the pregnancy is part of a scheme by an enemy to bring her down, but she ends up turning it around and using it to grow as a person.
Severus could be initially shocked and confused. He might feel a sense of loss and regret, especially if he had some feelings for Serena. He could then start to search for her, trying to understand why she left and if there's anything he can do to make it right.
Chuck's family could initially be disapproving. They might think that Serena is not the right match for Chuck. However, as time passes and they see how committed Chuck and Serena are to each other and the baby, they could start to come around. Serena's family, on the other hand, might be more focused on how this will change Serena's life in the public eye. Her sister could be either jealous or overly helpful, depending on their relationship dynamic.
One possible scenario in fanfiction for their marriage is that Serena and Nate decide to move away from the Upper East Side drama. They could buy a house in the countryside and start a more peaceful life. But of course, their friends would still find ways to visit and bring some of that city chaos with them.