One common theme is recovery. After Alec gets hurt, there's often a focus on how he heals, both physically and emotionally. Another theme could be the reactions of other characters. They might show concern, or in some cases, there could be conflict about how to deal with the hurt Alec.
One common theme is vulnerability. Alec is often shown as a strong and stoic character in the original series, but in hurt fanfiction, his vulnerability is explored. For example, when he's physically injured, we see a different side of him that's more reliant on others for help.
One common theme is the struggle to regain strength. After Alec gets hurt, he often has to fight to get back to his former self, physically and mentally. This can involve training, therapy, or just sheer willpower.
Overcoming obstacles is another theme. Fanfictions often show Maurice and Alec dealing with the social and family barriers that come their way. For example, in some stories, they have to face the disapproval of Maurice's family, but they still hold on to each other.
One common theme could be the reactions of the people around Alec. His friends, family, or partners might have different responses to his pregnancy, ranging from shock to support.
One common theme is power. Alec has a lot of power in the Twilight universe, and fanfictions often explore how he uses or struggles with it. For example, some stories might show him trying to control his powers better.
Another theme is the struggle against prejudice. Since they are from different 'worlds' in the story, they face a lot of judgment from others, and fanfictions often deal with how they overcome this. Also, the theme of self - discovery is quite common. Both characters grow and learn more about themselves through their relationship with each other.
Love is a very common theme. Their love story, how they overcame differences to be together. Another is the theme of acceptance, like Alec accepting Magnus' warlock nature and Magnus accepting Alec's Shadowhunter duties. And also the theme of family, as they both have different family backgrounds and how they merge their families in a way.
A frequent theme is also the power dynamics. Magnus has his powerful magic, and Alec has his position in the shadowhunter world. How they balance this in their relationship is often explored. Also, the theme of family acceptance is common. Alec's family and their reactions to his relationship with Magnus are often part of the stories.
Friendship is a very common theme. They are both important characters in the Shadowhunter universe, and many fanfictions explore how they become friends and support each other.
Love is also a prevalent theme. Whether it's a forbidden love or a newfound love, Alec's character is often put in situations where he experiences different kinds of love. It could be love for a fellow vampire or a human in the Twilight world.