The Weasley twins would likely make light of the situation at first. They might crack some jokes to ease the tension. But they would also use their own experiences to tell Harry and Ron that fighting over small things isn't worth it and that they should patch things up quickly.
The Weasley family would be divided. Molly would be heartbroken as she always saw Hermione as part of the family. Some of the Weasley siblings might side with Ron out of loyalty, while others might understand Hermione's point of view. Ginny, for example, might be more empathetic towards Hermione as a fellow woman who has her own ambitions.
Kim and Ron's friends would likely be very excited. Wade would probably be super helpful, using his tech skills to plan the perfect celebration or even create some cool gadgets for the wedding. Monique would be all about helping Kim pick out the perfect dress and making sure she looks amazing. Their other friends from school might be in awe, seeing two of the coolest people they know getting married.
Draco's Slytherin friends would be quite shocked. Some might shun him, thinking he's betraying the Slytherin ideals. However, a few might see the advantage of having a connection to Harry Potter. For example, if there are any threats to Slytherin as a whole, Harry's influence could be useful. So there would be a split in how Draco's Slytherin friends react.
Harry's friends would be extremely confused at first. Hermione might suspect something is wrong right away and start investigating. Ron, on the other hand, might be more straightforward and just think Harry has gone a bit strange. The Gryffindors might be suspicious of 'Harry' (really Draco) acting differently. For Draco's friends, they would also notice the change. Crabbe and Goyle might not be smart enough to figure it out immediately, but Pansy might sense that something is off with 'Draco' (really Harry).
Friends from different wizarding groups could react in different ways. The Gryffindors would be celebrating loudly and proudly. The Hufflepuffs might be the ones making sure everyone feels welcome and included in the wedding festivities. Meanwhile, the Ravenclaws could be giving intellectual toasts about the significance of their union in the wizarding world's history.
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.
Well, Hagrid would be extremely happy for them. He might offer to take the baby on rides on his back when it's old enough. He would also give them some really large and warm hugs of congratulations. Cho might be a bit more reserved in her reaction, but still polite and happy for them. She might offer some advice on how to balance a family life with their wizarding duties. And the Hogwarts professors, like McGonagall, would probably send them well - wishes. McGonagall might even offer some special tutoring for the future child if it shows magical aptitude early on.
In the fanfiction, if Ron finds out Harry is abused, it's a complex situation. Ron's reaction would be multi - faceted. Emotionally, he'd be a mess. He loves Harry like a brother. He might feel guilty for not noticing earlier. Ron would also start to view Harry in a new light, with more compassion and understanding. He would use his Weasley family connections to find resources or help for Harry. Maybe he'd ask his mother for advice or even get his older brothers involved if the abuse was from a powerful source within the wizarding world.
At first, Harry might be confused. He would try to figure out what went wrong. He might search his memory for any signs that could have led to this betrayal. Then, he would likely experience a range of emotions from sadness to rage. Depending on the nature of the betrayal, he could either try to win them back by showing them the truth or decide that they are no longer worthy of his friendship and focus on his own path, maybe even leaving the wizarding world for a while to clear his head.
At first, Harry could be heartbroken. He would wonder what he did wrong to make them leave. He might try to find them and reason with them. However, if he can't reach them, he would likely turn that pain into a driving force. He would focus on his goals, like fighting against Voldemort or protecting the wizarding world, even more fiercely, because he now has to prove himself not only to the world but also to his former friends.