Edward Nygma

Edward is intelligent, creative, calculating, kind, and caring. His meticulous and observant nature, often detecting clues and connections his superiors miss. However, he is also narcissistic, being infatuated by his intelligence and enjoys telling riddles to prove this, much to the annoyance of most of his co-workers. He can also be awkward, unintentionally insulting, and selfish, like getting the previous medical examiner fired as revenge for getting him suspended by making it look like he was stealing body parts. His obsession with riddles greatly annoys people he works with, who ask him to speak in layman's terms in frustration. Jim often answers some of the riddles, making Ed happy. However, this can also be a subconscious impulse, as he left his name NYGMA hidden in a forged good-bye message from Doughty to Kringle.

Killing Dougherty was the catalyst for a major change in Edward's behavior. The trauma of committing his first murder was enough to cause Edward to develop a split personality, one that's crazier and more aggressive. These two personalities merge in the second season, as a result, Edward is more impulsive, paranoid and prone to anger, and he now sees certain people as obstacles in his path that should be removed, such as the hunter he killed so that he wouldn't find Kristen's body, and even Jim, his friend, when Jim started getting on Edward's case about Kristen's whereabouts. He later justifies his change in behavior to Jim, claiming this is who he is and that all it took, besides killing people, was admitting it to himself.

After being frozen in a block of ice for months by the Penguin, and suffering from some brain damage because of it, Ed and Riddler are separate personalities again; though each embodies something different about themselves as a whole. Ed embodies their emotions, while Riddler is their high intelligence. Due to Ed abandoning his quest to regain his intelligence, Riddler briefly takes control at times, trying to get Lee killed so the trauma can allow him to take back control of their body. After Riddler is given back control of their body by Penguin finally speaking his name, Ed decides to subtly influences Riddler's feelings for Lee, so they can fuse back into one. However, Riddler is not swayed by Ed's feelings, instead coming to love Lee himself, being more drawn to the darkness in her than the kind doctor Ed saw. However, Riddler is more prone to jealousy, due to Lee's past romance with Gordon.

After nearly being killed, Ed and Riddler again merge. Unknown to him, thanks to Hugo Strange planting a control chip in his brain, it silenced his original Ed Nygma personality, effectively freeing him of the eternal struggle. Without the struggle, Riddler actually manages to mellow out a bit, gaining some of the calmer traits Ed had.

Edward Nygma, the Riddler from Gotham TV show, has set up traps with puzzles and riddles to lead Batman and James Gordon to him at a bank he plans to rob. He waits for them to appear and try stopping him.