Jerome is the villain in the TV series Gotham. At the same time, it was revealed that Jerome had a secret twin brother Jerome. Before Jerome died, Jerome left Jerome a "gift box". As soon as Jerome opened the box, he was infected with laughing gas. His skin turned white, his lips turned red and he went crazy.

Jerome is an extremely crazy criminal genius, and sometimes he will do whatever it takes to prove his point. His madness is his charm. As his father said, "You will be Gotham's nightmare". Although his body has fallen to death, his laughter has made his brother Jerome Valeska the most famous villain in Gotham in the future, confirming what he said before he fell: "I am not just a person, I am still a soul, and I will live forever in Gotham's resentment".