Another possibility could be Trick's daughter. Given the importance of Trick in the show and his family's history, his daughter getting pregnant could bring out a lot of family - related storylines. It could also involve the politics and secrets within the Fae world as they deal with the situation of a young Fae being pregnant.
One possible plot could be that a main female character in 'Lost Girl' accidentally gets pregnant. She then has to deal with the reactions of her friends and family. Some might be supportive while others could be judgmental. She also has to figure out how to balance her normal life in the 'Lost Girl' world, which is filled with supernatural elements, with the upcoming motherhood. For example, she might worry about how her pregnancy will affect her powers or her place in the supernatural community.
Aria could be a likely candidate. She's always been a bit of a risk - taker and her relationship with Ezra has had its ups and downs. A pregnancy in their relationship could add a whole new layer of complexity.
Maybe it could be a new character created specifically for the fanfic. This new girl could be from a traveling group of merchants who Naruto meets during one of his missions. Their encounter could lead to a relationship and ultimately the pregnancy.
As I mentioned before, Dee Dee could be a likely candidate. She's always getting into Dexter's business, and a pregnancy could add an interesting layer to her character. It could show a more serious and responsible side of her as she prepares to be a mother.
It could be about the challenges she faces while being pregnant. Maybe it would explore how she copes with her new condition while still having her magical duties. For example, she might have to deal with changes in her magic abilities due to the pregnancy.
Also, any friends that Renesmee has made throughout her life could be involved. They might be there to offer moral support, or there could be some who are jealous or envious of her situation, which could add some drama to the fanfic.
The potential father might be a new character introduced specifically for the fanfic. He could be a charming stranger who swept the 'gagaga girl' off her feet and then disappeared, leaving her pregnant and alone.
The main characters are most likely Annabeth and Percy. Since Annabeth is the one who is pregnant, she would be a central figure. And Percy, being her partner, would play a crucial role in protecting her and the unborn child in Tartarus.
Hinata is a very likely character. She has a strong connection with Naruto in the original series, so it's easy to imagine her in a harem situation and being pregnant. Sakura could also be part of it. Despite her feelings for Sasuke in the original, in fanfic scenarios, she could end up in Naruto's harem. And then there's Ino. She has her own charm and relationship with Naruto's friends, which could lead to her being included in the harem and having a pregnancy storyline.
Well, obviously Bella herself. Then there could be the father of the baby, if it's not a mystery. There might also be her friends or family members. They could play different roles, like being supportive or having doubts about the situation. And perhaps there are some medical characters, like a doctor or a healer if it's in a more fantasy - based setting, who are involved in taking care of her during the pregnancy.