Well, Thorin is a proud and strong character. When he finds out Bilbo is pregnant in the fanfiction, he probably steps up to take on the role of a protector. He would ensure Bilbo has everything he needs, from a safe place to stay to proper nourishment. He might also be a bit worried about how others in their group or society will react to this situation, but his loyalty to Bilbo would be unwavering.
Another theme is redemption. Given his flaws and the mistakes he made in the original story, a lot of fanfictions focus on his path to redemption. They show him trying to make up for his past actions, whether it's towards his comrades or his own sense of honor.
Another theme is the reimagining of relationships. With Thorin being female, the relationships with the other dwarves, Bilbo, and even elves can change significantly. Her interactions with male characters might have a different dynamic, like a potential romantic angle with some characters that wasn't there before.
One common theme is the clash and eventual harmony of different cultures. Hermione comes from the wizarding world in Harry Potter, and Thorin is from Middle - earth. Their different backgrounds, values, and ways of life often collide at first but then find a way to coexist. For example, Hermione's magic might be seen as strange by the dwarves at first, but then they come to rely on it.
Well, there's 'Fateful Encounters' in the world of 'thorin x bilbo fanfic'. This story has a really interesting plot where Bilbo's presence gradually changes Thorin's view of the world. Then there's 'Shared Secrets' which shows how they start to trust each other more and more as the story progresses. Also, 'Journey's Endearment' is a fanfic that focuses on the emotional connection between them during their adventures.
Yes, there are some out there. You can try searching on fanfiction websites like Archive of Our Own. There are often different takes on this concept within the Tolkien fanfiction community, with some exploring unique storylines around this idea.
There could be a Thorin OC story where the OC is a young dwarf who idolizes Thorin. This OC follows Thorin on his journey to reclaim Erebor. Along the way, the OC's naivete and enthusiasm remind Thorin of his own younger self. The OC gets into various scrapes, but Thorin takes it upon himself to mentor the young dwarf, and through this relationship, both characters grow.
Love is also a prevalent theme. Whether it's a platonic love or a romantic one, many fanfictions play with the idea of their feelings for each other. Some explore how their different backgrounds, Thorin as a dwarf king and Bilbo as a hobbit, influence the way they express their love and care for one another. It can be a very interesting exploration of their characters' emotions.
Redemption can also be a theme. Thorin's pride and how he might overcome it with Bilbo's help is something seen in some fanfictions. And loyalty, both to each other and to the company they are part of, is frequently a central theme as well. For example, in some stories, they are tested in terms of their loyalty to one another during difficult situations.
There is a fanfiction called 'Thorin's Treasure'. It delves deep into the emotional bond between Bilbo and Thorin. It shows how they support each other through various challenges in Middle - earth. Additionally, 'A Hobbit's Journey with a Dwarf King' is also quite engaging as it focuses on their shared adventures and the growth of their relationship.