Padme would most likely have an immediate emotional response. Tears might well up in her eyes as she sees Anakin burned. She would be in a state of disbelief at first, not wanting to accept that this has happened to him. But then, her natural instinct to care for him would kick in. She would use her influence to get the best medical care available, and she would stay by his side throughout his recovery, constantly reassuring him that he will be okay, even if she's not entirely sure herself.
She is also Anakin's love interest, and their relationship is a central part of the story. Her love for Anakin gives him something to fight for, but also becomes a source of his internal struggle as he tries to balance his Jedi duties with his love for her.
Well, in many of these fanfictions, Padme's survival acts as a catalyst for Anakin's redemption. Since she's alive, Anakin has a reason to break free from the chains of the Dark Side. He might see that there's still hope for a life with Padme and their family. Also, Padme could be the one to help him face his inner demons and come back to the Light Side. Their relationship becomes a central force in his journey back to the Jedi way, or at least a new path that is neither fully Jedi nor Sith. This completely alters the tragic fate he had in the original Star Wars storyline.
Well, Geralt might die as a result of a powerful curse or magic. Maybe he angered a powerful sorcerer or witch who cast a spell on him that he couldn't resist. This could be a slow and agonizing death as the magic takes its toll on his body and mind. Another possibility is that he sacrifices himself for someone he loves or to save the world from a great evil. He might put himself in harm's way knowingly, and in the process, lose his life.
Superman's death in comics is often a result of epic battles or selfless acts. For instance, he might face an opponent whose power is just too overwhelming, or he might give his life to prevent a major catastrophe.
Gwen's death in the comics is often a result of a tragic and complex event. Usually, it involves a confrontation with a powerful villain or a series of unfortunate circumstances.
Well, Loki's comic deaths aren't straightforward. It could be as a result of clashes with other superheroes or from cosmic events that he gets caught up in. The circumstances change from one comic series to another.