Hawk would be his usual comical self, but also very supportive. He'd make sure Elizabeth has plenty of food, especially his favorite scraps. And he'd be the first to volunteer to keep an eye out for any danger, even though he's not the most powerful. He'd be like a little guardian for the expecting couple.
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.
Ban would probably be excited and start thinking about all the fun things he could teach the baby, like how to steal food without getting caught in a humorous way. King might be a bit more reserved at first but then offer to make the most beautiful crib with his powers. Diane would be super excited and offer to babysit all the time, cooing over how cute the baby will be.
There could be some stress on their relationship too. The responsibilities of impending parenthood might cause some arguments. For instance, they might disagree on where to raise the child or how to handle the child's potential powers. But these conflicts would ultimately strengthen their bond as they work through them together, learning more about each other in the process.
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.
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.
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.
The friends' reactions could also vary depending on their own personal experiences. If one of their friends has had a difficult pregnancy or lost a baby in the past, they might be more guarded in their excitement. They could offer more emotional support rather than just focusing on the happy aspects of the pregnancy, like Ayako who might be there to listen to Mai's fears and concerns throughout the pregnancy.