Another option is Tumblr. There are many fans on Tumblr who create and share fanfics or at least talk about them. You can search for the relevant tags related to Raven Branwen and Weiss. However, Tumblr's search can be a bit tricky sometimes, so you may need to be patient and explore different combinations of tags.
Some smaller, specialized RWBY - focused fanfic communities or forums might have such fanfics. For example, certain Reddit communities dedicated to RWBY might have users sharing or discussing 'raven x weiss' fanfics. But remember to respect the community rules when looking for content there.
You can try Archive of Our Own (AO3). It has a large collection of fanfictions across various fandoms, and there's a good chance you'll find Raven Branwen - related ones there, including those with the 'lemon' tag if they exist. Just be sure to follow the site's rules and guidelines.
I'm sorry but I don't have a ready - made list of 'raven branwen lemon fanfic'. But if you're into fanfiction about this character, you could also try reaching out to other fans on social media platforms dedicated to the series. They could share their favorite stories with you. Just remember to respect the intellectual property rights and the community guidelines when exploring fanfics.
You can try some popular fanfic websites like Archive of Our Own (AO3). It has a large collection of fanfics, and you can search specifically for Weiss lemon fanfic using the search bar and relevant tags.
Since I'm not overly familiar with 'raven branwen lemon fanfic' specifically, but generally in fanfics, common themes could include adventure, self - discovery, and relationships. In the case of a character - focused fanfic like this, it might explore Raven Branwen's past, her relationships with other characters in a more in - depth way, and how she grows or changes through different situations.
One common theme is friendship. Given their different personalities and backgrounds, exploring how they become friends or what kind of friendship they could have is popular. For example, Raven's more mysterious and rough nature contrasted with Weiss's more refined and sometimes uptight personality can create interesting friendship dynamics.
I'm not sure of a specific 'raven x weiss lemon fanfic' that is considered 'good' as it depends on personal taste. But you can look at the ratings and reviews on fanfic platforms. High - rated ones with positive reviews are more likely to be enjoyable.
Another place to look is FanFiction.net. It has a large collection of fanfics, and you might be able to find some interesting Weiss x Neptune stories. However, the quality can vary, so you may need to do some sifting through the results.
You can start by looking on fanfic platforms like Archive of Our Own (AO3). It has a large collection of RWBY fanfics, and you can use the search function to specifically look for ones where Weiss is pregnant. Another option is Fanfiction.net, but AO3 generally has a more diverse and inclusive range of stories.
I'm not certain where to find 'branwen777 fanfic' specifically. You could try searching on popular fanfic websites like Archive of Our Own or FanFiction.net.