One popular 'thorin x oc fanfiction' is 'A New Beginning in Erebor'. It tells the story of an original character who finds herself in Middle - earth and becomes involved with Thorin. The character development is really well - done, and the relationship between the oc and Thorin unfolds in a very natural way.
There's also 'A New Journey with Thorin'. In this fanfiction, the OC has a unique backstory that ties in well with Thorin's quest. The author does an amazing job of showing the chemistry between them as they face various challenges together. It's full of action and also some tender moments.
Fanfiction.net also has a wide selection. Look for stories where the relationship between Thorin and the OC is more centered around mutual respect and friendship that could potentially develop into something more. For example, the OC could be a healer who tends to Thorin's wounds during their journey, and through their interactions, a deeper connection forms.
One interesting Thorin OC fanfic is 'Thorin and the Lost Soul'. In this fic, the OC is a mysterious figure who has a deep connection with Thorin's past. It's really good at exploring Thorin's character in a new light through the interactions with the OC.
One popular bilbo x thorin fanfiction is 'The King Under the Mountain's Heart'. It beautifully portrays their relationship development, from initial distrust to a deep bond. Another great one is 'A Hobbit's Journey with a Dwarf King' which focuses on their adventures together and how their feelings for each other grow in the process.
One popular 'female Bilbo x Thorin fanfiction' is 'The Lonely Mountain's Heart'. It beautifully weaves a story of their relationship in the context of the Middle - earth adventure. The characterizations are quite vivid, and it shows how a female Bilbo could bring a different dynamic to the relationship with Thorin.
I'm not sure which specific Thorin OC pregnant fanfics are available. You could try searching on fanfic platforms like Archive of Our Own. They have a large collection of fanfics, and you can filter by the relevant tags to find ones about Thorin and a pregnant original character.
A common theme is adventure. Since Thorin is often on a quest in Middle - earth, the oc gets swept up in these adventures. For example, they might be traveling with him to reclaim Erebor. Another theme is love against the odds. Thorin is a dwarf king with many responsibilities, and the oc is an outsider, so their relationship faces many challenges.
One great Thorin Oakenshield fanfiction is 'The King Beneath the Mountain's Heart'. It delves deep into his inner thoughts and his relationships within the company. It shows a more vulnerable side of Thorin while still maintaining his strong leadership qualities.
One popular female Thorin fanfiction is 'The Queen Under the Mountain' which reimagines Thorin as a female leader. It delves into her relationships within the company and her journey to reclaim Erebor in a unique way.
One popular Thorin and Hermione fanfiction is 'The Unexpected Bond'. It explores a unique scenario where Hermione somehow ends up in Middle - earth and forms an interesting relationship with Thorin. The story is well - written with great character development.