They would become even closer. Their love would grow deeper as they are about to start a family together. There would be more tender moments between them.
After getting married, they would become more open and trusting with each other. Since they know each other's identities as Ladybug and Chat Noir, there would be no more secrets between them. Their relationship would be more stable and they would support each other even more in their daily lives and superhero duties.
Well, at first, they might be a bit nervous about how the baby will affect their relationship. But as time goes on, they would grow closer. They would have to communicate more about parenting decisions, which would strengthen their bond. Also, seeing each other as parents would add a new dimension of love. For example, Adrien seeing Marinette as the mother of his child would make him cherish her even more, and vice versa.
Adrien might become more protective. Usually, he's carefree to some extent, but with Marinette pregnant, he would be constantly on guard. For instance, he'd be extra vigilant against any potential threats, even the smallest ones. He may also become more serious about his responsibilities as a future father.
One possible plot could be Marinette struggling to raise the baby on her own while dealing with the heartbreak of Adrien leaving. She might find support from her friends like Alya, who helps her through the tough times. Meanwhile, Adrien could be off on some self - discovery journey and later realizes his mistake.
It could also be about the challenges they face during the pregnancy. Marinette might have health issues, and Adrien has to be extra careful and supportive. There could be a lot of emotional turmoil as they both grow up faster than they expected. They might also face some judgment from society, but they stand strong together to face it all.
He could also be a bit worried. Adrien might think about the responsibilities that come with having a child. He might wonder if they are ready for this big step, considering their own lives and any potential challenges. He would then sit down with Marinette and have a serious conversation about how they are going to handle everything.
Maybe there's a plot twist where one of them loses their memory due to an akuma's power during the pregnancy. This forces the other to try and make the失忆的一方 remember their relationship and the impending baby. It can create a lot of heart - wrenching moments.
The situation would force them to develop their problem - solving abilities. They'll have to deal with financial issues, housing problems maybe, and the social implications. Adrien might have to learn how to earn money in a more stable way, and Marinette could explore ways to balance her creative pursuits with motherhood. This would all contribute to a major transformation in their characters.
In many fanfictions where Adrien and Marinette are 'just friends', it often shows a different side of their dynamic. It might focus on their platonic adventures, like teaming up to solve a school mystery without any romantic undertones. This can be refreshing as it explores their characters beyond the typical love - interest aspect.
Adrien as a merman might become more in tune with the natural elements of the ocean. He could be more carefree and wild, as opposed to his somewhat reserved self on land. His love for adventure could be amplified, and he might be bolder in expressing his feelings, especially towards Marinette. Marinette as a mermaid could be more confident. The underwater world gives her a new sense of freedom, and she's less worried about the small things that bothered her on land. She might also be more assertive in her relationship with Adrien.