Often, famine in Harry Potter fanfic can be a backdrop to show the social and economic disparities within the wizarding world. Some fanfic authors may depict poorer wizarding families or those on the outskirts of society suffering from famine while the wealthy or those closer to the Ministry seem unaffected. It could also be a factor in driving characters to make desperate choices, like joining a dark cause in exchange for food for their families.
Famine might also be related to a magical disaster in a fanfic. For instance, if there was a misfiring of a powerful spell that affected the fertility of the land. In this case, characters would need to use their magical skills and knowledge to try and reverse the situation. Hermione, for example, might be researching in the library for ancient spells to restore the land's productivity while Harry and Ron try to keep the peace among the starving populace.
One common theme is survival. Characters have to find ways to survive the famine, whether it's by stealing food (which goes against their moral code usually), or by working together to grow food magically. Another theme is the breakdown of society. Famine can cause unrest, and in fanfics, we might see wizarding communities turning on each other, with accusations of hoarding food or using dark magic to get more for oneself.
Flying in Harry Potter fanfic is sometimes a key element in adventure stories. For example, characters may fly to hidden places that are not accessible by normal means. The description of flying could involve the use of magic spells to enhance the broomstick's speed or maneuverability. Some fanfics might even introduce new types of flying devices that are unique to the fan - created world.
In many Harry Potter fanfics, alchemists can be portrayed in various ways. Some might be shown as reclusive and mysterious figures, much like in the original Potter lore where alchemy has an air of the arcane. They could be depicted as having a deep understanding of magical substances and transfigurations that go beyond the normal wizarding knowledge.
In many Harry Potter fanfics, isolation can be portrayed in various ways. For example, a character might be isolated due to being a pariah in Hogwarts because of a new or misunderstood magical ability. This could lead to them having to find their own place in the wizarding world outside the norms of the school. Another way is through a character being ostracized for their family's actions, like if their family has ties to the Death Eaters. They may face isolation from other students who fear or distrust them.
In some Harry Potter fanfic, incendio is portrayed as a very powerful spell. It can quickly create large and intense fires that are hard to control. For example, a character might struggle to contain the fire they've created with incendio.
In Harry Potter fanfic, elves are often portrayed in diverse ways. Some fanfics might expand on the house - elves like Dobby and Winky. They could be given more complex personalities, for example, an elf who is not only subservient but also has dreams of freedom and education. Some might show elves with magical abilities beyond what was shown in the original books, like the ability to transform into other creatures momentarily to escape danger.
In the world of Harry Potter fanfic, sex is not a common or appropriate topic. The source material is centered around the wizarding world, with its unique creatures, spells, and a story of a young wizard's journey. Fanfic writers should be more interested in things like how the wizarding education system could be improved in their stories, or how the characters would react to new magical threats. Sexual content just doesn't fit into this magical universe that J.K. Rowling created for all of us to enjoy as a story of magic, not adult themes.
Ghosts can also be portrayed as tragic figures. Take Moaning Myrtle for instance. Fanfic might expand on her sad story, showing how her death and her state as a ghost are a result of her unfulfilled desires and the pain she endured while alive. They can add a touch of melancholy to the story.
It's often portrayed as a very alluring potion. In many fanfics, the description of its smell is really detailed. For instance, one character might smell freshly baked cookies (if they have a thing for food or a baker they like) and a particular type of flower that grows in a place special to them.
In fanfic, the Nundu is often portrayed as a huge, hulking beast with a menacing presence. It's shown as very powerful and its poisonous breath is usually emphasized.