Ichigo's family on the other hand, would also be surprised. His father might be a bit more open - minded though, given his own strange abilities and knowledge of the spirit world. His sisters would likely be excited about having Byakuya as a brother - in - law, especially if they see how much Ichigo cares about him. Overall, Ichigo's family would probably welcome Byakuya once they get to know him better.
There could also be some family members on both sides who oppose the marriage. Maybe some of Byakuya's more conservative relatives think Ichigo is not worthy of the Kuchiki name. And some of Ichigo's friends or extended family might worry that he is getting too involved in the dangerous world of the Soul Society through this marriage. But in the end, their love for Byakuya and Ichigo would hopefully prevail.
Ichigo's family might be a bit surprised at first. His father, Isshin, would probably be happy in the end though, seeing his son find love. His sisters might be excited to have Rangiku as part of the family and look forward to all the fun they could have together. As for Rangiku's side, if she has any family in the Soul Society, they might be a bit more hesitant. They might worry about how a relationship with a human like Ichigo could work out in the long run, but eventually come around when they see how much they love each other.
Chad would be excited and happy for them. He's always been a loyal friend to Ichigo, and he would see Yoruichi as a great match for him. He might even offer to help with the wedding preparations.
The reaction of their families could be quite diverse. Natsu doesn't really have a traditional family, but his friends in Fairy Tail are like family. They would be excited and probably throw a huge party. Cana's father, Gildarts, has been absent for a while. But when he hears the news, he might feel a mix of emotions. He could be happy that Cana has found love, but also a bit sad that he hasn't been around more. However, overall, the Fairy Tail guild would embrace their union and make them feel special and loved.
Midoriya's family would be ecstatic. His mother would be busy helping with the wedding preparations, giving advice on everything from the dress to the food. Uraraka's family would be equally happy. They would see Midoriya as a kind - hearted and strong young man. Her mother would likely bond with Midoriya's mother over the wedding plans, and the two families would come together to celebrate the union of the two young heroes.
I think Puck's fairy friends would be divided. Some of his more mischievous friends would be all for it, seeing it as a great opportunity to play more pranks on the mortal world through Sabrina. But his more serious fairy relatives might be concerned about the mixing of the mortal and fairy worlds through this marriage.
Lucas's family might be overjoyed. They could see Maya as a wonderful addition to the family. His parents might start planning big family dinners and vacations together right away. His siblings could be excited to have a new sister - like figure in the family.
Ron's family might be initially shocked. His parents, who know Shego was once a villain, would be worried about Ron's safety. But they could come around if they see how much Shego has changed and how happy Ron is. His friends might also be skeptical at first but gradually accept it.
The Weasley family's reaction would be intense. Fred and George might make jokes about it at first, but deep down they'd be concerned. Ginny's older brothers would be protective and think Draco isn't good enough for her. The Malfoy family would also be in turmoil. Draco's grandparents, if they were still alive, would probably be appalled. However, Draco and Ginny's love could gradually change the minds of some family members. For example, Draco could show the Weasleys that he has changed for the better, and Ginny could make the Malfoys see that she is a strong and worthy addition to their family.
The Uzumaki family might be a bit shocked at first. But Naruto's kind - hearted nature could make them eventually come around. His mother Kushina might be more accepting as she always wanted Naruto to be happy. As for Sasuke's family, well, it's a bit more complicated. Since Sasuke is the last of the Uchiha, his family's traditional values might be a hurdle. However, if Sasuke is determined, he might be able to convince any remaining family members or those who care about the Uchiha legacy that his relationship with Naruto is a positive thing.
Elena's friends and family might be a bit wary at first. After all, Elijah is from a different world. Her aunt Jenna might be concerned about the implications of this marriage for Elena's future. However, her friends like Bonnie and Caroline could come around once they see how much Elijah loves Elena. For Elijah's family, some might be happy to see him find love, while others, who are more traditional or power - hungry, might see Elena as an outsider and try to break them up.