Just something to add here: During my writing and research, I realised that in the Black Lagoon series, the Nuevo Laredo are revealed to be a Mexican cartel, even though I thought until at this point in my fan book series, I had written the cartel as being Cuban and/or Cuban-American.
Either that change in the fandom page was a retcon or that the group were barely given a background until the later chapters of the manga. However, I'll stick with my own change, since I had made Gerolamo (or officially Girolamo) a Cuban drug lord.