Their friends would probably be initially shocked. But then, most of them would be very supportive. Kara, for example, would be super excited and offer to help with anything from babysitting in the future to giving advice on super - powered babies if there are any implications related to that in the fanfic's universe.
The fanfic might focus on the emotional journey of Nia during her pregnancy. She could be having mixed feelings - joy, fear, and anticipation all at once. Brainy, on the other hand, would be trying his best to support her. He might research everything about pregnancy and parenting to be well - informed and helpful.
To write their relationship well, first understand their individual characters. Brainy is highly intelligent and sometimes struggles with emotions, while Nia is strong - willed and in touch with her intuition. Show their interactions gradually evolving. For example, start with them being polite colleagues, then as they face challenges together, they start to trust each other more. Use dialogue to show their different perspectives. Brainy might analyze a situation in a very logical way, while Nia might offer a more emotional or intuitive response.
A third plot could involve a time - travel adventure. Brainy's technology malfunctions and sends him and Nia to a different era. They have to figure out how to get back to their own time while also making sure they don't accidentally change history. In this era, they meet different versions of their friends and enemies, and they must use their wits and powers to navigate this strange new world and find a way home.
Their friends might be initially shocked. Some, like Alice, might be excited and start planning for the baby's future right away. Others, like Edward, could be more worried about the potential risks to Bella's life.
Her friends would likely be very protective. They might form a sort of guard around her, making sure she's safe at all times. Some of them would probably be excited about the new life coming into the world and start preparing things like a nursery or gathering supplies for the baby.
Alya would probably be super excited and start planning everything from baby showers to future playdates. She'd be there for Marinette every step of the way, giving advice and support. Nino might be a bit more reserved at first but would soon warm up to the idea and be a great source of comfort for Adrien, like helping him pick out baby clothes or build nursery furniture.
Hermione would probably be super helpful. She'd offer all kinds of advice on everything from pregnancy care in the wizarding world to setting up a nursery with magic. Ron would be a bit more awkward at first, but he'd still be excited. He might joke around a bit to lighten the mood. Neville would be very kind and bring over some of his own home - grown magical plants that could be useful during the pregnancy, like plants that have calming properties or ones that can help with minor ailments.
John would probably be shocked at first. He'd be concerned about how Sherlock would handle being a father, given his rather detached nature. But then he'd be very supportive, offering practical advice like setting up a nursery. Mrs. Hudson would be over the moon. She'd start knitting baby clothes right away and would constantly be fussing over Molly, making sure she's eating well and resting enough.
Some of their friends might be worried at first. They know the dangerous lives that Natsu and Erza lead. But then, they would all come around and be very supportive. They could throw a big celebration for the pregnancy, and everyone would chip in to help make a comfortable space for the baby in the guild. There would be a sense of new hope and family spirit in the group.
Diane would probably be overjoyed. She's always been close to Meliodas and Elizabeth, and she would likely offer to protect them and help out in any way she can. Maybe she'd use her giant strength to build a special place for them to stay during the pregnancy.