When magic is misused. Hermione is very much by - the - book when it comes to magic. If she sees someone using dark magic or even just misusing a simple spell in a dangerous way, she'll be angry. For example, if a fellow student tries to use an untested charm on another student just for fun and it goes wrong.
One situation could be when she is infiltrating an enemy stronghold. She uses throwing knives quietly to take out guards without alerting others. For instance, in a fanfic where the Death Eaters have a hidden lair, Hermione sneaks in and uses her throwing knives to silently eliminate the sentries at the entrance.
One of the common themes is redemption. There are characters in the movies who have done wrong things and in fanfictions, they might be on a path to redeem themselves. Also, loyalty is a big theme. The loyalty among the crew in the movies is further explored and sometimes tested in fan - created stories. And of course, the theme of love and relationships, not just romantic but also the platonic relationships between the characters.
One possible reason could be a disagreement over how Molly treats Harry. Maybe Molly is being overprotective of Harry in a way that Hermione thinks is hindering Harry's growth as a wizard. For example, if Molly tries to stop Harry from taking certain risks that Hermione believes are necessary for his development.
One common situation is when it comes to relationships. If there's a love triangle involving Harry, Dean, and a female character like Hermione or Ginny. Harry might see Dean as a rival for the girl's affections.
One possible reason could be betrayal. If her friends, say Ron or Harry, were to lie to her about something really important, like a secret mission or a hidden danger, that would make Hermione furious. In fanfiction, her loyalty to her friends is often a central part of her character, and any threat to that trust could lead to her anger.
One common theme is the combination of different types of action. For example, if it's a crossover with a superhero universe, you'll see the fast cars along with superpowers. Another theme is the clash of different cultures. When they cross over with something like a Japanese anime - inspired world, the Western car - centric culture of 'Fast and the Furious' meets the unique cultural elements of the other universe.
One common theme is the adaptation of Bella to the high - octane lifestyle. Since the Fast and Furious world is all about speed, danger, and loyalty, fanfictions often show Bella learning to fit in and thrive in such an environment.
One common theme is the underdog story. The OC often starts as an unknown in the world of high - speed racing but rises to become an important part of the crew. Another theme is loyalty. The OC has to prove their loyalty to the group, just like the characters in the original movies. Also, the love for cars and the pursuit of the perfect race are always there.
A frequent situation where Naruto defends himself in fanfiction is when he is targeted because of his status as a Jinchuriki. Enemies may try to capture or kill him to gain control of the Nine - Tails' power. Naruto has to use all his skills, from his ninjutsu to his strategic thinking, to defend against these threats. He also defends himself when he is involved in disputes within his own village, either because of political reasons or misunderstandings among the ninja clans.
The conflict might develop through the actions of other characters as well. For example, Ginny could be caught in the middle and her attempts to mediate only make the situation worse. Or perhaps Fred and George accidentally exacerbate the situation with one of their pranks that has an unintended consequence on the Hermione - Molly relationship.