Guns Akimbo was not a comic book. It emerged as an original idea for a film, without having any prior existence in the comic book format. The story was specifically crafted for the big screen.
I'm not entirely sure as I haven't read it in detail. But generally, a graphic novel with 'guns akimbo' might be about action - packed stories involving characters using two guns at the same time. It could have elements of crime, adventure, or even a dystopian setting where gun - wielding is a key part of the plot.
Without having read the 'guns akimbo graphic novel', it's difficult to name the main characters precisely. But based on the nature of the title, one can assume that there would be a central character who is defined by their use of guns akimbo. This character might be an outcast or a regular person thrust into extraordinary circumstances. There could be side characters like friends or allies who help the main character in their adventures. And on the opposing side, there would probably be powerful enemies, perhaps with their own motives and backstories that conflict with the goals of the guns - akimbo - using protagonist. The relationships between these characters would be what drives the story forward, with the main character's growth and development being a key aspect of the narrative.
Another theme might be friendship. Despite their differences, they could form a strong bond in the fanfiction. Maybe they start off as strangers but gradually learn to trust and rely on each other. This theme of friendship growing between two unlikely characters can be really appealing in fanfiction. Also, there could be a theme of discovery, as they discover new things about each other's worlds and cultures.