The key characters include Batman, who uses his martial arts skills and detective acumen to combat the villains. The Joker is vital as his insanity and devious plans are always a major threat. Harley Quinn, being the Joker's sidekick, is also important. She often gets involved in the Joker's schemes. Another important character is Two - Face. His split personality makes him a very unpredictable and dangerous foe in Arkham City.
Batman, of course, is the most notable character. He is the Dark Knight who patrols the city. Then there's the Arkham Knight, who is a major antagonist in the story. Also, Commissioner Gordon plays an important role as he is often in communication with Batman and helps in maintaining law and order in the city.
Batman himself is the most notable character. Then there's The Joker, his archenemy. Also, characters like Catwoman, who has a complex relationship with Batman, are important. And of course, Commissioner Gordon who often works with Batman to keep Gotham safe.
Obviously, Batman is one of the main characters. He's the one who has to face the Riddler's challenges. And the Riddler himself, who creates all those tricky riddles and traps. There may also be some minor characters who are affected by the Riddler's schemes in the stories.
In 'batman arkham city graphic novel', Batman is the central figure. He is the Dark Knight, the protector of Gotham. The Joker is a major character, a chaotic and unpredictable villain who challenges Batman at every step. Catwoman, with her alluring and ambiguous nature, is also one of the main characters. She moves between the world of crime and Batman's world. Additionally, other characters like Harley Quinn, who is associated with the Joker, and some of the more minor villains like Killer Croc also play their parts in the story, either as direct threats to Batman or as part of the complex web of relationships within Arkham City.
The main characters include Batman, who is on a mission to deal with the situation in Arkham. Then there's the Joker, whose devious plans are a big part of the story. Also, other inmates like Harley Quinn, who is often associated with the Joker, play important roles in the narrative.
The Joker is definitely one of the most interesting. His maniacal laughter and crazy schemes always keep the story exciting. He's constantly testing Batman and his ability to maintain order in Arkham.