Another trope might be the challenges she faces during the pregnancy. This could include dealing with Shadowhunter duties while pregnant, or facing some sort of danger that puts her and the unborn baby at risk. Maybe she has to fight off demons while being pregnant and has to find new ways to protect herself and the baby.
One common trope is the exploration of how her pregnancy affects her relationships. For example, how it changes her relationship with her family or her romantic partner. It could show her family being overprotective or her partner being extra supportive.
You can try fanfiction websites like Archive of Our Own (AO3). There are often a large number of fanfictions on various topics, including those about Isabelle Lightwood being pregnant. Just use the search function on the site and type in relevant keywords.
The popularity of Clary Fray and Isabelle Lightwood fanfics lies in the complex relationship between the two characters. They are both strong, independent female characters in the Shadowhunter universe. Fans love to explore their friendship, which is filled with loyalty, support, and a bit of friendly rivalry at times.
A common trope is the 'enemies to lovers' or at least 'rivals to lovers'. Since they have different personalities and ways of doing things in the Shadowhunter world, it can be interesting to see how they overcome their differences. Another is the 'hurt/comfort' trope, where one of them gets injured or is in a difficult situation and the other provides support and care.
There's also 'Sisters in Arms: Clary and Isabelle'. This fanfic focuses on their growth as characters. It starts with them being a bit at odds but as the story progresses, they become closer and form an unbreakable bond. It's quite detailed in depicting their emotional journey and the challenges they face together.
One popular trope could be the overprotective Thranduil. In many fanfictions, he would go to great lengths to ensure the safety of the pregnant OC. For example, he might increase security around the forest realm and be extremely cautious about any potential threats. Another trope is the OC's struggle with the new life growing inside her. This could involve dealing with morning sickness, mood swings, and the fear of the unknown regarding motherhood in the context of the Middle - earth setting. Also, there might be a trope where the relationship between Thranduil and the OC deepens during the pregnancy. They could share more tender moments and grow closer as they anticipate the arrival of their child.
Family dynamics is another theme that shows up. Given the complex family situations in the original story, fanfiction often delves deeper into how Clary and Isabelle interact with their families, both blood - related and their Shadowhunter 'family'. There are also stories that focus on their training and becoming stronger Shadowhunters, which is also quite popular.
One common trope could be the 'overprotective partner' trope. Luther, being the strong one, might be overly protective of Allison during her pregnancy. Another could be the 'unexpected pregnancy' trope, which could lead to a lot of drama and character development.
One common trope is the 'unexpected pregnancy'. It creates a lot of drama as the two characters, Bakugou and Midoriya, have to deal with the sudden change in their lives. Another is the 'protective partner' trope, where either Bakugou or Midoriya becomes extremely protective of the other during the pregnancy.
A great plot could involve Alec facing discrimination within the Shadowhunter community due to his pregnancy. This could lead to him fighting for his rights and the rights of other male Shadowhunters who might experience the same in the future. Also, the story could show his pregnancy cravings for some very unique Shadowhunter - themed foods.
One popular trope is the 'enemies - to - lovers' situation. Roommates start off not getting along, constantly bickering over things like who ate the last of the food or who didn't clean up. But as time passes, they gradually see the good in each other and fall in love. Another is the 'secret identity' trope. For example, one roommate could be a famous artist or writer but is keeping it a secret from the other, and the story unfolds as the secret is slowly revealed. There's also the 'roommate as a guardian angel' trope where one roommate unknowingly protects and looks out for the other in various ways.