One common theme is the exploration of their relationship. Whether it's a friendship or something more complex. Another theme could be their adventures together in the strange world they exist in.
There are some 'Blackhat x Flug' fanfictions that can be found on various fanfiction platforms. Some might focus on their unique relationship dynamics within the context of the show or comic they are from. You can start by looking on popular fanfiction websites like Archive of Our Own.
The main characters are obviously Slug and Flug. Slug might be a character with unique physical abilities or a certain charm. Flug could be a character with high intelligence, perhaps a bit of an eccentric when it comes to his ideas.
Maybe Slug is a magical creature and Flug is a human scientist who wants to study Slug. At first, Slug is wary of Flug but as Flug shows kindness and a genuine interest in understanding Slug rather than just exploiting it, they form a bond. They end up using Slug's magic and Flug's scientific knowledge to solve a big problem in their community, like a natural disaster or a disease.
The 'blackhat true story' could be about real - life events related to blackhat hackers. It might involve their activities like hacking into systems, stealing data, or causing cyber - disruptions.
I'm not entirely sure as 'bagless flug paperhat fanfic' seems like a very specific and perhaps made - up or very niche concept. It could potentially be a type of fan - created story (fanfic) that involves some unique elements like 'bagless' things and 'flug' (which might be a made - up term) and 'paperhat'. Without more context, it's hard to say more.
The kidnapper could be a power - hungry villain from another dimension. This villain has heard of Dr Flug's reputation and thinks that by kidnapping him, he can gain access to advanced technology. Or it could be a group of bounty hunters who were hired by someone who has a grudge against Dr Flug. They would capture him and deliver him to the person who hired them.