I'm not sure specifically which fanfics there are about Charlie Morningstar being pregnant. You could try searching on fanfic platforms like Archive of Our Own. There might be various creative interpretations in such fanfics, perhaps exploring different storylines around her character and this new situation.
At the moment, I can't say for sure if there are popular fanfics regarding Charlie Morningstar's pregnancy. However, if such a fanfic exists and is popular, it might be because it offers a unique take on the character. It could be that the writer has managed to create a really engaging story around her pregnancy, perhaps with unexpected twists and turns. Also, if it has strong character development and a good understanding of the world that Charlie Morningstar inhabits, it might gain more popularity among fans. But to really know, one would have to explore the fanfic landscape thoroughly.
There could be various fanfics with this theme. One might explore how the other characters in Haven react to Audrey being pregnant. For example, Nathan might be overly protective, given his relationship with Audrey. Another aspect could be how Audrey deals with her pregnancy while still trying to solve the mysteries in Haven.
One type of appropriate fanfic could be where the pregnancy is a source of new adventures. Maybe she discovers new powers or abilities related to the impending motherhood. It could also focus on the preparations she makes for the new arrival, like building a nursery in the game world she is part of.
There might be a fanfic that focuses on Charlie's love for books and how it influences his interactions with others. For example, he could start a book club at school which leads to some interesting friendships and situations.
One possible plot could be that in an alternate magical universe, a spell goes wrong and causes both Bill and Charlie to experience some of the physical symptoms of pregnancy, while Hermione, being the brilliant witch she is, tries to find a way to reverse the spell. Along the way, they could have humorous exchanges about the situation and learn more about the magic behind such strange occurrences.
I'm sorry, I don't have specific fanfics to recommend directly. You can try searching on fanfic platforms like Archive of Our Own (AO3). They have a large collection of fanfics, and you might be able to find some related to Sadayo Kawakami being pregnant by using relevant keywords in their search function.
I'm not sure if there are many specific fanfics about Garam being pregnant in the Naruto universe. You could try searching on major fanfic platforms like Fanfiction.net or Archive of Our Own. They have a wide range of Naruto - related fanfics, but it might take some time to find one that exactly meets this criteria.
I'm not sure if there are extremely popular ones specifically about this. However, in general, if there were, they would likely gain popularity because fans are always interested in exploring new aspects of their favorite characters' lives. Pregnancy can bring out different sides of Audrey's character, like her nurturing side or her determination to protect her child, which could be appealing to readers.
There could be a fanfic that focuses on Charlie Bushnell's character forming an unlikely friendship with another character. This could show different aspects of his charm and kindness. For example, he might meet a shy character and help them come out of their shell. The story could detail their daily interactions and how they grow together as friends.
One interesting fanfic could be about Charlie's discovery of Renesmee's unique abilities in a more detailed and heart - warming way. For example, it might show how Charlie, as a normal human, slowly comes to terms with the fact that his granddaughter is part vampire and has extraordinary powers.