MJ could be very supportive. She might help Gwen with shopping for baby clothes and setting up the nursery. The other superhero friends like Daredevil or Iron Man (if they exist in the same universe in the fanfiction) could offer protection and resources for the baby's safety. They would also be happy to see Peter and Gwen starting a family as it shows a new chapter in their lives.
Their friends would probably be really excited. Harry, for example, might be a bit jealous at first but then become the baby's cool uncle. Aunt May would be over the moon and would offer lots of help and advice on raising the baby.
Some of their more scientific friends could be interested in studying if the baby has any unique genetic traits due to Peter's powers. But overall, their friends would be a great support system for Peter and Gwen, helping them through the joys and difficulties of raising a child.
Their friends would probably be really excited at first. Raven might be a bit reserved but still happy for them. Cyborg would likely be the most enthusiastic, already thinking about building cool toys for the baby.
Sakura would probably be a bit surprised at first, but then she'd be happy for Naruto. She might offer to help with the baby's medical needs. Kakashi would be his usual calm self, giving Naruto some sage advice on fatherhood. As for Konan's friends from Amegakure, they might be a bit more hesitant, but once they see how happy Konan is, they would come around and support the new family.
Well, some friends might be a bit worried at first. If Serena and Darien are new to parenting, their friends could be concerned that they won't be able to handle it. But then as they see Serena and Darien adapt, the friends would become more supportive and be there for them.
Their friends would be really excited. Chad would probably be happy and offer to help with any heavy lifting or physical tasks around the house for when the baby arrives. Uryu might be a bit more reserved but still show his support in his own way, like making some special baby clothes. Rukia would be thrilled and would be constantly visiting, giving Orihime advice on motherhood.
Kim might be shocked at first. She's used to Ron being her sidekick and Shego being an enemy. But she could come around and be a sort of godmother figure, helping out when needed. Rufus would probably be excited. He'd be like a little furry uncle to the baby, always there to play and keep the baby entertained.
The friends would probably be a great support system. May and Max could bring gifts for the baby, like cute Pokémon toys. Dawn might offer to babysit so Ash and Misty could have some time for themselves. All of their friends would be there to celebrate the new addition to the family and would help out in different ways as the baby grows up.
Pikachu would probably be very protective of the baby. Since he's Ash's closest Pokémon partner, he'd be like a little guardian. Brock would likely offer his help and advice on taking care of the baby, as he has some knowledge about it. Misty might be a bit shocked at first but would eventually warm up and be like an aunt to the baby.
Tails would probably be really excited. He'd be the helpful uncle, always ready to use his mechanical skills to make cool toys for the baby. Knuckles might be a bit more gruff at first, but deep down he'd be protective of the little one. Amy would be over the moon and would constantly offer to babysit so she could play with the baby.
Sasuke would probably be initially skeptical but would come around. He might see the baby as a sign of Naruto's growth and stability. Sakura would be overjoyed and would likely offer to be like an aunt, helping with medical care if needed. Kakashi would be his usual laid - back self but would secretly keep an eye out for the baby's safety. The other villagers, especially the ones who have always supported Naruto, would see the baby as a new hope for the village and would celebrate the new addition to the Uzumaki family.
Kagome's friends from her village might be initially shocked. They know Kagome has been involved with the demon world, but having a baby with a wolf demon like Koga is a whole new level. However, some of her closer friends might eventually come around and support her. Inuyasha, on the other hand, would probably be a bit jealous at first but might also see the potential in the baby for good in the fight against evil.