He might become more serious. Having such a powerful item would weigh on him.
Izuku's story would be completely transformed. With the Infinity Gauntlet, he could potentially end all crime in an instant with the snap of his fingers. However, this new power would also isolate him. His friends might not understand the burden he now carries. He would have to constantly be on guard against those who would try to steal the gauntlet from him. And his self - discovery journey would take a different turn as he has to come to terms with being one of the most powerful beings in his world.
He might use it to save his city from all kinds of threats. He could snap his fingers and make all the bad guys disappear, like the Green Goblin and Doctor Octopus. He's a hero, so he'd probably use it for good.
If Spider - Man has the Infinity Gauntlet in fanfiction, he would likely use it to protect his loved ones first. He could use the Soul Stone to ensure the safety of Mary Jane, Ned, and Aunt May. His approach to using the gauntlet would probably be different from someone like Thanos. Spider - Man is all about protecting the little guy, so he'd focus on using the power for the benefit of ordinary people. He might even use the Stones to improve living conditions in the city, like using the Power Stone to generate clean energy for everyone.
In some fanfiction, Spider - Man might obtain the Infinity Gauntlet through a stroke of luck. Maybe it just falls into his hands during a battle in an alien - invaded New York. Another way could be that he is chosen by some powerful cosmic entity to be the wielder of the gauntlet for a specific purpose, like restoring balance to the universe.
It would change drastically. He'd be much more powerful than before. He could easily end the war against Voldemort.
His relationship with Aunt May would likely become more strained as she becomes overprotective, fearing she could lose him too. With his friends at school, he might become more distant as he is preoccupied with superhero duties. He could also be more cautious around MJ, not wanting to put her in danger in the new, more dangerous world.
Naruto would become more confident, not just in his abilities but also in his decision - making. Having the Infinity Gauntlet gives him an edge that no one else has. He might become a bit more reserved as he has to be careful with the power he wields. He can't just rush into things like he used to.
He'd be more confident. Having that much power at his fingertips would make him less hesitant in dangerous situations. He might become a bit more arrogant too, as the Infinity Gauntlet could easily go to one's head.
Well, if Naruto had the Infinity Gauntlet, the story would change drastically. First, he could easily defeat his enemies like Madara or Kaguya with just a snap. No more long and arduous battles. Second, the power dynamic in the ninja world would be completely shifted. Naruto might use the gauntlet to bring true peace, not just the temporary peace they had before. He could potentially reshape the world according to his ideals without having to convince others through his usual means of talk and fight. Third, his friends might view him differently, perhaps with a bit of fear or awe. But Naruto being Naruto, he would still try to use the power in a positive way, but it would be a whole new ball game in the Naruto universe.
Spider-Man was not one of the characters who died in the Infinity Gauntlet comics. The story had its own set of casualties, but he wasn't among them. The plot was complex and full of surprises, but Spider-Man made it through.