The main characters are Betty and Kate. Betty may be depicted as having a bit of a fiery spirit. She stands up for what she believes in within the context of the factory work. Kate is usually the character who has a calming influence. Their interactions, whether it's during work hours or in their off - time, are what most of the fanfiction focuses on.
One common theme is friendship. Given their relationship in the show, fanfictions often explore the deepening of their friendship, how they support each other through the hardships at the bomb factory. For example, they might help each other deal with a difficult supervisor or a particularly tough workday.
One great story could be 'The Friendship Beyond the Factory' which delves deep into how Betty and Kate support each other during the tough times in the factory. It shows their evolving friendship and how they deal with the daily hardships.
Friendship is a very common theme. Given their situation in the bomb factory, Betty and Kate rely on each other, and this bond is often explored in fan fictions.
Another theme is female empowerment. They are working in a factory during a challenging time, and fan fictions usually show how they are strong and independent, making their own decisions and standing up for themselves and others.
Another place could be Fanfiction.net. It has been around for a long time and has a vast collection of fan - created works. However, the search function might not be as refined as AO3. But still, it's worth a shot to look for Bomb Girls fanfiction featuring Betty and Kate.
One great piece of Betty and Kate Bomb Girls fan fiction is 'The Bond of Betty and Kate' which focuses on their friendship during the war. It beautifully portrays their mutual support and the challenges they face together in the factory.
There's also 'Betty and Kate's Adventure'. In this fan fic, they go on a journey outside of the factory to help a fellow worker's family. It's really interesting as it shows their courage and loyalty not just to each other but also to the community around them.
Since I'm not familiar with this 'bomb city story', the main characters could be various types of people. It might be a heroic soldier who was involved in the events leading to the bombing, or it could be a civilian doctor who is trying to save as many lives as possible in the bombed city.
I'm not entirely sure as I haven't read the book recently, but they could be scientists involved in the bomb's creation, military personnel dealing with the bomb's security or potential use, and civilians affected by the bomb's presence.
I don't know the specific 'bomb graphic novel' you're referring to, so I can't say for sure. But it could be a group of soldiers if it's a war - related story, or perhaps a young inventor who has to deal with a bomb - related situation.