to prepare to write the script, walker watched various movies featuring gangsters. he attempted to take what he could from "the untouchables", especially robert de niro's portrayal of al capone. walker watched movies created and set in the 1930s, including but not limited to "the public enemy", "little caesar", "once upon a time in america", "miller's crossing" and various movies starring james cagney, because he believed they would give him a truer feel on how people of the era sounded and talked. he wanted to capture the lingo and rhythm. because "baccano!" is a "stylized gangster flick" and because of the nature of anime, he made the dialogue more flowery and lingo-ridden than it would have been in reality.