Natasha could also be greatly affected. She is perceptive and if she reads Tony's thoughts, she might use that knowledge to manipulate situations within the team for the better or worse. Maybe she discovers Tony's concerns about a potential threat and uses her skills to help address it.
I think it could be Clint. He has a family and the thought of his family being Snapped away would be devastating. He would be haunted by the idea that he wasn't there to protect them. He might feel a great sense of guilt and loss compared to the others.
One interesting scenario could be that the Avengers find out about Tony's insecurities regarding his role in the team. They might then be more understanding and supportive, changing the dynamics within the group.
Probably Iron Man. He's often focused on the task at hand and might be the most annoyed by the interruption.
Definitely Tony Stark. He's all about his high - tech world and order in his lab. Goose could easily get into his lab and start pawing at his precious inventions. It would drive him crazy as he tries to keep Goose away from his dangerous experiments and valuable tech. Also, Goose might short - circuit some of his equipment with its fur or just by being clumsy around it. And Stark is not really used to dealing with such unruly creatures, so he'd be very affected.
The other villains in Gotham. The power dynamic changes when the Joker is a kid. They might see this as an opportunity to take over his territory or try to use the situation to their advantage. But they also might be worried that if the Joker turns back to normal, he'll come after them for taking advantage of his weakened state.
There are a few reasons why Tony Stark might consider destroying Avengers fanfiction. He could be concerned about the spread of misinformation within the fan - created stories. For example, if a fanfiction presents false information about his technology or the Avengers' capabilities, he might see it as a threat to the integrity of the real Avengers. Also, he might not want certain relationships or events in the fanfiction to overshadow the official storylines. Tony Stark is very protective of his legacy and the Avengers' brand, and fanfiction that goes against his vision could be seen as a nuisance.
Definitely Natasha Romanoff. She's a skilled spy and could train Tony's daughter in espionage skills, or at least how to be observant. Another one would be Clint Barton. He could teach her archery in a fun way. They would have a lot of father - figure - like interactions with her, which would be really heart - warming.
Tony could be the team captain. As the captain, he has a special bond with the team members and might want to do something special to boost their morale. He would know what kind of surprises would really make an impact on them.
His closest friends like Ron and Hermione would probably be the most affected. They are used to having Harry around and relying on him. His sudden ignoring would leave them confused and worried.
Sasuke would be highly affected. He has a deep bond with Naruto, and Naruto's presence in the village has been a sort of anchor for Sasuke's new - found loyalty to Konoha. Without Naruto, Sasuke might feel lost or even question his own place in the village again.