The Hogwarts students would be greatly affected. The younger students who saw Harry as a hero would be in shock. They would lose their sense of safety and hope. The older students who knew Harry personally would feel a personal loss. The teachers, like McGonagall, would be grief - stricken. She had watched Harry grow up at Hogwarts and had seen his potential. His death would make her question the future of Hogwarts and the wizarding world. Even the ghosts at Hogwarts would feel a strange melancholy. Harry had interacted with them, and his death would be a significant event in the history of the school.
The other characters would be deeply affected. Neville, for instance, would see Harry's sacrifice as an example of ultimate courage. He might be inspired to step up more in the fight against evil. Luna would be sad but also understand Harry's choice on a deeper level. She might see it as part of a greater cosmic plan. The teachers at Hogwarts, like McGonagall, would be heartbroken. Harry was like a son to many of them. They would feel a sense of pride in his selfless act but also a great sorrow. Hermione would be in a state of shock and disbelief. She would constantly replay the moment in her mind, wondering if there was anything she could have done to prevent it. This would change her personality, making her more withdrawn at first as she tries to come to terms with the loss.
For Harry, it would be devastating. Ron has been his best friend since they were kids. He'd likely feel a deep sense of guilt, like he failed to protect him. Hermione would be heartbroken. Her relationship with Ron was complex and full of unspoken feelings. She might become more reclusive, burying herself in her studies to avoid the pain. The Weasley family would be shattered. Molly would be inconsolable, and the siblings would all feel a void. Ginny, in particular, would lose a brother who was always there for her.
For Ruby, it would be a huge blow. She's the team leader and Weiss is her friend. Ruby would likely feel guilty, thinking she could have done more to protect her. Yang would be angry, both at the situation and potentially at herself. She might become more impulsive in her actions, seeking revenge. Blake would be deeply saddened. She might withdraw into herself, blaming her own past actions or inactions for Weiss's death.
He would be extremely confused. Harry has always thought of his parents as heroes, and suddenly finding out they betrayed him would shatter his world view. He'd question everything he believed in.
For Harry, it would be a huge loss. He's lost so many people in his life already, and Hermione was like a sister to him. He'd likely feel a deep sense of guilt for not being able to save her. Ron would be devastated too. He might blame himself for not noticing Hermione's illness sooner. Their friendship would be deeply affected, with both of them having to deal with a void that can't be filled.
For Gibbs, it would be a huge loss. He has mentored Tony and they have a father - son - like relationship. Gibbs would likely become more withdrawn and even more obsessed with solving cases, as a way to distract himself from the pain. Ziva would feel a deep sense of guilt, as she and Tony have a complex relationship. She might blame herself for not being there for him when he needed her.
The other heroes in the Hero Association would be in shock. Saitama was like an unbeatable force among them. His death would make them realize how vulnerable they really are. They would have to reevaluate their own strength and the safety of the world. Some might be inspired to train harder, while others could be paralyzed by fear.
The Weasley family would also be greatly affected. Mrs. Weasley would surely mourn Harry as one of her own. Ginny, who had feelings for Harry, would be heartbroken. She might become more fierce in her pursuit of justice in the wizarding world. And the other students at Hogwarts, like Neville, would be inspired by Harry's sacrifice to step up and be braver in the face of danger.
Harry could experience a profound sense of isolation. In the original story, his parents' love was like a shield. Without it, he would be more vulnerable emotionally. He may struggle with feelings of worthlessness and may have to search hard for a sense of belonging. This could lead him to make some hasty decisions in his quest for acceptance, either by trying too hard to please others or by distancing himself from potential sources of love out of fear of being rejected again.
The whole crew would be in shock. Kanan was an important part of the team. Sabine, for instance, would feel a sense of guilt, wondering if there was something she could have done to prevent his death. Zeb would be solemn, and the group's dynamic would change completely. They would have to find a way to move forward while still mourning Kanan, and it would be a long and difficult process. Their hope and morale would take a big hit, but they might also find new strength in avenging his death or continuing his legacy.