It's possible that there is a character who is a scientist like Frankenstein. This character could be either trying to correct the mistakes of Frankenstein or repeating his same errors in the context of a world that is on the verge of extinction. And then there could be a female character who serves as a moral compass or a source of hope for the last man.
There may be a character who has a connection to the monster that Frankenstein created. This character could be haunted by the past actions of Frankenstein and the existence of the monster. Alongside the last man, they might be on a journey to either find a solution to the desolate state of the world or just come to terms with their own existence in this post - Frankenstein apocalypse.
The theme of survival is likely prominent. When you have 'The Last Man' situation, characters must fight to stay alive. In the context of the Frankenstein novels, this could be intertwined with the idea of the abomination that Frankenstein created. Maybe the last man has to deal with the remnants of Frankenstein's unethical experiments while trying to survive in a harsh world.
Often in such novels, there are supporting characters. These could be friends or family members of the main character. They might not have as much power or influence as the lead, but they contribute to the story in their own ways, like providing emotional support or helping with practical tasks.
Johnny Frankenstein is the key character in the series. He is the one with the unique identity. There might be a mentor - like figure, an older and wiser character who tries to guide Johnny in understanding his nature. There could also be some sidekick characters who accompany Johnny on his journey. These characters would add depth to the story by interacting with Johnny, either helping him or causing more trouble for him.
The main characters are Victor Frankenstein and the monster he creates. Victor is the ambitious scientist who defies nature to create life. The monster, on the other hand, is the result of Victor's experiment. He is initially innocent but becomes vengeful due to the cruel treatment he receives from humans.
The two main characters are Victor Frankenstein and the creature he creates.
The two main characters are Victor Frankenstein and the creature he creates. Victor is a scientist who is driven by his ambition to create life. The creature is the result of Victor's experiment, and he has to deal with being rejected by society because of his appearance.
Well, of course, there's Victor Frankenstein. He's a complex character, driven by his ambition to create life. His actions set the whole story in motion. Then there's the creature. It's a being with emotions and intelligence, but is constantly rejected. Elizabeth, Victor's fiancée, is also an important character. Her relationship with Victor is significant, and she becomes a victim of the creature's revenge.
The main characters in Frankenstein are Victor Frankenstein, the creator of the monster, and the monster itself. Victor is driven by his scientific ambition, while the monster struggles to find acceptance and understanding in a hostile world.
The main character is the 'last angry man' himself. Around him, there could be family members such as a wife or children who either support or are at odds with his angry nature. There may be neighbors who are affected by his actions or words. And perhaps there are colleagues or people from his workplace if the story has that aspect. There could also be a local community figure, like a priest or a community leader, who tries to mediate or influence the angry man's situation.
I'm not entirely sure without reading the book specifically, but it could be soldiers or leaders in a military - type setting, given the title's connotations of a fight to the end.