You could also develop the plot by focusing on the physical and emotional changes Merlin goes through during the pregnancy. He might struggle with the hormonal changes, just like any pregnant person would. Emotionally, he could become more protective of Gwen and the unborn baby. Meanwhile, they might have to deal with threats from outside forces who somehow find out about the pregnancy and want to use it for their own gain. This could add a lot of action and suspense to the fanfiction.
One idea could be that it's a magical pregnancy. Maybe Merlin was accidentally affected by a spell meant for someone else, and now he's pregnant with Gwen's baby in a very strange and magical way. This could lead to a lot of confusion and drama in Camelot as they try to figure out how to handle this unprecedented situation.
Merlin might become even more protective of Arthur. Since Gwen is carrying Arthur's child, Merlin would see it as his duty to safeguard the future of Camelot. He could be more involved in Arthur's personal affairs, which might initially annoy Arthur but eventually he'd come to appreciate Merlin's concern.
The plot could develop with Harry and Bill trying to figure out how to handle the situation. They might have to deal with the reactions of the wizarding community. For instance, there could be a lot of gossip and rumors flying around, which they would need to face together.
Perhaps Gwen discovers she has some latent magical ability during her pregnancy, which is awakened by the life growing inside her. This could cause a stir in Camelot as magic is feared. Merlin then has to step in to help Gwen control her powers and keep it a secret from those who would harm her. Also, Arthur could be faced with the dilemma of how to protect Gwen and the baby from the anti - magic sentiment in the court.
Gwen's character might develop a more nurturing side. She was always a bit of an edgy and independent person, but with the pregnancy, she starts to care more about others. Trent, on the other hand, could become more protective. He might start learning self - defense or taking extra precautions to keep Gwen and the unborn baby safe.
Gwen would likely become more determined and strong - willed. Merlin's sacrifice would be a huge emotional blow to her. It might make her more resolute in fighting for the good he believed in, perhaps becoming a more fearless leader in Camelot. She may also carry a sense of guilt and a need to prove that his sacrifice was not in vain.
In Merlin elf fanfiction, Merlin's character can develop in many ways. He might become more in tune with his magical side as he interacts with the elves. Since elves are often depicted as having a deep connection to magic, Merlin could learn from them to control his powers better.
It's portrayed as strong and loyal. They are there for each other no matter what. Like when Merlin is in danger because of his magic, Gwen stands by him.
One of the interesting aspects of their friendship in fanfiction is how they influence each other's growth. Merlin's knowledge of magic and his adventures often expose Gwen to a world beyond her ordinary life. Gwen's kindness and strong moral compass also guide Merlin, especially when he is faced with difficult decisions regarding his use of magic.
One great Merlin and Gwen fanfiction is 'A Royal Bond'. It beautifully explores their relationship in a world filled with magic and political intrigue. The author does a wonderful job of portraying Gwen's strength and Merlin's loyalty.