Another way is that Harry is constantly apologizing to Hermione. He doesn't just say it once, but keeps repeating how sorry he is. He also listens very attentively when Hermione scolds him, accepting all the blame without trying to defend himself too much because he knows he was in the wrong.
In the fanfiction, Hermione may isolate herself from others for a while as a form of self - punishment for hurting Harry. She reflects on her actions and when she comes back, she is a changed person. She tries to build a stronger, more trusting relationship with Harry by being more open and honest with him about her feelings and mistakes.
Fred often uses his humor to diffuse tense situations that Hermione might be in. For example, if she's being harassed by some bullies, he'll make a joke that makes the bullies look stupid and also makes Hermione feel better.
Maybe Harry accidentally cast a spell on Hermione during a training session that caused her some harm. So he feels guilty because he didn't mean to hurt his friend.
He could use his influence in the wizarding world. For instance, he might use his connections in the Ministry of Magic to keep Hermione safe from any unjust laws or persecutions. He may also physically stand in her way when she is in danger from other dark wizards or Death Eaters.
Dudley often shows his jealousy through mean actions. He might bully Harry more in fanfiction, like taking his things or pushing him around. It's his way of trying to assert dominance since he feels inferior to Harry in other aspects, especially when it comes to Harry's magical world.
She might use her magic knowledge. Maybe she tries some healing spells or potions she has learned. For example, she could research in the library to find a special spell that can soothe the pain of the scars or even gradually make them fade.
In the fanfiction, Snape may protect Hermione by shielding her from the Dark Lord's influence. Given his double - agent status, he would be in a position to know if Voldemort has any plans involving Hermione. He could then take steps to keep her out of Voldemort's sight, perhaps by misdirecting Death Eaters or using his own magic to create a protective barrier around her when she's in danger.
In some fanfictions, Harry Potter shows his strategic genius by outmaneuvering his enemies in battles. For example, he might use his knowledge of magic in unexpected ways to gain an advantage. He could combine spells in new ways or use the environment to his benefit, just like how he used the Forbidden Forest's terrain to set traps in one fanfic I read.
He often gives her words of encouragement. For example, he might tell her that her intelligence and courage are her greatest assets and that she should trust herself more. He could also share stories from his past that are relevant to her situation, so she knows she's not the only one who has faced difficulties.
Ron shows his care for Hermione by standing up for her. For instance, when others might make fun of her for being a 'know - it - all', Ron defends her. He also shares his food with her, which is a simple but warm gesture in the wizarding world.