Tsukune's human family might be initially shocked. But if they see how much he loves Mizore, they could gradually come to accept her. They would have to get used to the idea of having a youkai in the family. As for Mizore's youkai family, they might be more accepting since they understand the youkai world better. However, they could also be protective of Mizore and want to make sure Tsukune is worthy of her.
For Tsukune's family, it could be a big adjustment. They might be afraid of the unknown aspects of having a youkai daughter - in - law. However, as they get to know Mizore and see how she makes Tsukune happy, they would start to accept her. On Mizore's side, her family may have different reactions. Some of her relatives might be excited about the union as it could bring new opportunities for their family in the human - youkai relations. Others might be more cautious, but in the end, love and Tsukune's sincere efforts would likely win them over.
Their married life might be full of adventures. Since they come from different backgrounds in the original story, they would have to learn to combine their different lifestyles. Maybe Tsukune would introduce Mizore to human traditions, while Mizore would share her youkai customs with him. They would also have to face challenges together, like dealing with other youkai who might not be so accepting of their union.
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.
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.
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.
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.