In the 'Harry Potter' series, Harry Potter and Hermione Granger are a popular ship. They have a strong bond throughout the story, sharing many adventures and relying on each other's skills and knowledge. Their friendship could be seen by some as having the potential for a romantic relationship.
One popular trope is the 'power - up' trope. In many fanfictions, characters from both Fairy Tail and Demon Slayer gain new powers or improve their existing ones in unique ways. For example, a fanfiction might have Tanjiro learning some Fairy Tail magic to enhance his demon - slaying abilities. Another common trope is the 'team - up' trope. Fans love to see characters like Natsu and Tanjiro working together against a common foe. It creates a lot of exciting action scenes and interesting character dynamics.
A common theme is power - up. Writers like to show Gray getting new powers related to demon slaying and how he masters them. For example, in some fanfics, he gains a new form of ice - make magic that can harm demons more effectively.
In Naruto fanfiction, a popular theme is power - ups. Fans like to write about Naruto or other characters getting new and stronger abilities. For Demon Slayer, the theme of redemption for demons is quite common. In Fairy Tail, friendship and the power of the guild are often - explored themes. For instance, many Fairy Tail fanfictions show how the strong bond between guild members helps them overcome difficulties.
A popular theme is the power - up theme. Lucy might gain new powers related to Demon Slayer abilities in the fanfiction. For instance, she could develop a way to use her magic to purify demons like the Demon Slayers do with their swords.
One important theme is family. Tanjiro's love for his sister Nezuko and his desire to protect and save her drives his whole journey. Another is perseverance. He faces numerous challenges as a demon slayer but never gives up. Also, the theme of good vs. evil is prominent as he battles the demons who are the source of evil in this world.
Inosuke is interesting as well. He was raised by wild boars and has a very wild and unruly nature. He is extremely competitive and has his own strange ways of fighting demons. His rough exterior but good heart make him a memorable character.
One popular theme is redemption. Since Daki is a demon, some fan fictions might explore the idea of her finding a way to redeem herself. This could involve her making amends for the harm she has caused to humans.
One popular Demon Slayer light novel is 'Kimetsu no Yaiba: The Flower of Happiness'. It expands on the world and characters of the Demon Slayer series. Another is 'Kimetsu no Yaiba: One - Winged Butterfly'. These light novels often provide additional backstories and adventures for the characters we know and love from the main series.