Sakura might be a bit worried at first. She's always been concerned about Naruto's safety, and a new weapon like Zabuza's sword could seem dangerous. But she would also trust Naruto's judgment in the end.
Shikamaru, being the smart and observant one, would analyze the situation thoroughly. He would probably warn Naruto about the potential political pitfalls and how to navigate them. He might also offer some strategic advice on how to handle the relationship aspect, like how to communicate effectively with his new partner in the political marriage so that Naruto doesn't get caught up in unnecessary drama or power plays.
Others might be a bit shocked at first. But after getting used to it, they could come around. For example, they might initially tease him a little but then realize it's just Harry being Harry and trying something new.
Sakura might be a bit surprised at first but would quickly support Naruto's choice if she sees that Fem Kami makes him happy. Sasuke would probably be indifferent on the surface but secretly happy for Naruto as long as it doesn't interfere with their own goals. Shikamaru would likely think it's a troublesome situation but would also go along with it as long as Naruto is sure about what he's doing.
Sakura would be very worried. She would immediately try to find a medical solution, using her knowledge as a medical ninja. She might be disgusted by the worms at first, but her concern for Naruto would override that.
Sasuke would be very suspicious at first. He's always been cautious about Naruto's new powers, and this one, which has the ability to take other people's powers, would make him wonder if Naruto was going to change. Sakura would be worried about the moral implications. She'd try to talk to Naruto about using it for good. Kakashi, on the other hand, would be more understanding. He'd see it as just another power Naruto has to learn to control and would offer his guidance on how to use it responsibly.
However, there could be some friends who are less than thrilled. Maybe they are jealous of the attention Erika and Kyoya are getting. Or perhaps they think Erika and Kyoya are too young or not ready for a baby, and they might try to persuade them to consider other options, which could lead to some conflict.
In many cases, friends can be notified or see that you've reacted. It depends on the privacy settings of the platform and how they handle such reactions. Some platforms might give more visibility, while others might have more limited visibility based on your settings.
Itadori did indeed die in the manga. His death had a significant impact on the story and the other characters. It was a turning point that led to many new developments in the plot.