One common theme is the adjustment of their relationship. With Hermione being pregnant, they have to deal with new responsibilities and a deeper level of commitment. Another theme could be the reactions of their friends and the wizarding community. Some fanfictions might explore how Harry, Ron and others respond to this unexpected situation.
I'm sorry I can't directly recommend specific 'viktor and hermione pregnant fanfiction' as it may vary a lot in different fanfiction platforms. But you can start by searching on popular fanfiction websites like Archive of Our Own. Just use the search terms 'viktor and hermione pregnant' on their search bar, and you may find a good number of relevant stories.
Hermione's friends from Hogwarts like Harry and Ron might be a bit shocked at first. Ron, in particular, might have some mixed feelings as he has had a bit of a competitive streak with Viktor in the past. But eventually, they would come around and support her. Viktor's friends from Durmstrang would probably be more accepting as they might respect his choice more blindly. They could be excited for him and offer their own unique magical gifts or knowledge for the upcoming baby.
One idea could be that they face challenges from their different magical cultures. For example, Hermione's friends from Hogwarts might be initially skeptical of Viktor due to his Durmstrang background. Another could be that they discover new magic related to pregnancy that has been long forgotten. Maybe they find a spell that can communicate with the unborn child's magic even before it's born.
In a fanfiction, Hermione and Viktor's baby could be the result of a magical accident. Maybe they were both working on a complex spell that went awry and somehow bound their magical essences together. This led to the unexpected pregnancy. Their friends from Hogwarts and Durmstrang are initially shocked but then become excited for them. The baby grows up to be a unique wizard with a blend of British and Bulgarian magical traditions.
In the fanfiction, Draco could be an observer. He might not directly interfere with Hermione and Viktor's relationship but instead watch from afar. He could be in a state of self - reflection, comparing their relationship to his own past relationships or his family's view on love and marriage. As he observes, he might learn something about himself and his own capacity for love, and this could lead to his own character growth without directly involving himself in Hermione and Viktor's engagement.
One great Viktor and Hermione mate fanfiction is 'The Unlikely Bond'. It beautifully explores their relationship as they face various challenges together in the wizarding world. The story delves deep into their personalities, showing how Hermione's intelligence and Viktor's determination complement each other. It also has some really interesting plot twists that keep you hooked from start to finish.
In fanfiction, their relationship can be a vehicle for exploring themes of acceptance. Hermione is often seen as an outsider in some ways at Hogwarts due to her intelligence and Muggle - born status. Viktor, too, might feel out of place in the more Anglicized wizarding world. When they are together, they can create a space where they both feel accepted and understood, which is a very heartwarming aspect of their relationship in these fictional stories.
In many fanfictions, Hermione and Viktor's relationship is often depicted as a deep and complex one. They might start as acquaintances due to the Triwizard Tournament. Their relationship could be explored through adventures they go on together, sharing magical knowledge, and understanding different cultural aspects of the wizarding world. For example, Viktor could introduce Hermione to some unique Bulgarian magic traditions, which she would be eager to learn about.
Perhaps in the fanfiction, they get engaged in a very magical setting, like on top of a floating mountain in Bulgaria. Then they have to plan a wedding that combines both wizarding cultures, which is full of challenges and fun cultural exchanges.