One of the main themes is friendship. Despite their differences, fanfictions often show Harry Potter and Thranduil forming a friendship. This friendship is usually based on mutual respect for each other's abilities and knowledge. Also, the theme of adventure is quite common. Since both characters are from rather adventurous worlds, they often go on quests or face challenges together in the fanfictions. For example, they might team up to fight a new dark magic threat that neither of their worlds has faced before.
One common theme is identity. Harry has to figure out how to balance his wizard identity with his newfound elven heritage. Another is family. Since Thranduil is his father in these stories, there's often exploration of what that family dynamic means. For example, how does it affect his relationship with the Dursleys or the Weasleys.
One common theme is the clash and subsequent melding of different cultures. Harry comes from the wizarding world of Hogwarts with its own set of rules and values, while Thranduil is from the elven realm with a very different way of life. Fanfictions often explore how they deal with these differences.
One common theme is the exploration of two different magical worlds colliding. Harry comes from the wizarding world of spells and potions, while Thranduil is from Middle - earth. So, how their magic systems interact is often a theme. Another theme could be the struggle against prejudice. Since they are from different worlds, they may face opposition from their respective communities. Also, their relationship development, from initial attraction to a deeper bond, is a frequently explored theme.
One common theme is culture clash. Since Thranduil is from Middle - earth and often crosses over into very different settings like modern Earth or other fictional universes, his elven culture clashes with the new environment. For example, in crossovers with a modern world setting, his view on technology and modern social norms can create interesting situations.
The theme of self - discovery is also prevalent. The OC, being in a new and magical world, often has to learn about their own strengths and weaknesses. In a story where an OC is a human in Thranduil's realm, they might discover a new side of themselves as they interact with the elves and face the challenges of the elven world.
Often, these fanfictions might have themes related to power dynamics in relationships. Thranduil is a king, so his status can play into the relationship with the other characters in the story. For example, there could be stories where his partner is either in awe of his power or challenges it in an intimate relationship context. Another theme could be the forbidden love aspect, as his character is often depicted as a bit aloof and reserved, so a relationship that goes against his normal behavior or status quo can be a common theme in such fanfictions.
One common theme is power dynamics. Since Thranduil is a powerful elf king and dragons are also very powerful creatures, their interactions often involve a struggle for power or respect. Another theme is mystery. Dragons are often mysterious in these stories, and Thranduil tries to figure them out.
One common theme is the 'enemies to lovers' trope. Given that Thranduil and Thorin have had their differences in the original stories, many fanfictions explore how they might overcome those differences and fall in love. Another theme is the exploration of their different cultures. Thranduil is an elf - king and Thorin is a dwarf - prince, so their cultural differences add an interesting layer to the relationship.
One common theme is the power of love across different species. Since Thranduil is an elf and the reader is presumably a human or from another race, their relationship often explores how love can bridge those gaps. Another theme is adventure. The reader may get involved in Thranduil's world of elves, which is filled with magic and danger, and they go on quests together.
One common theme is the clash and then the melding of different cultures. Bilbo is a hobbit from a simple, home - loving society, while Thranduil is an elvenking from a more refined and ancient culture. Another theme is the idea of unexpected friendship or even love that blossoms between two very different individuals.