Isaac: ENFP
Miria: ESFP
Firo: ESFJ
Maiza: IxFJ
Luck: Ixxx (probably a Chart-the-Course type though)
Szilard: xxTJ
Ennis: INFJ
Vino: ENFP
Lua: IxFx (minus INFJ)
Ladd: ESTP
Chane: ISFJ
Nice: ENFJ
Jacuzzi: xSFJ
Eve: INFP
Dallas: ESTP
Czeslaw: IxTJ
I agree with Isaac and Miria.
Firo never struck me as ESFJ but now that you mention it I can see it.
I'm not sure Maiza is an INFJ or ISFJ but I'm going to say ISFJ based on vibes...
Luck might be ISTJ also based on vibes.
I would say Szilard is xSTJ. He definitely has Te to accomplish what he does and I think he uses more past experiences to aide him than patterns.
Agree with Ennis being INFJ.
I saw Vino as INTJ beforehand because of his Ni to envision the goal he has followed up with Te to accomplish it and then Fi for his 'justice' and morals. However, I could definitely see ENFP as well with his Ne rambling on being ruler of the world and strong beliefs and morals.
Agree with Ladd and I'm going to say Lua is ISFP (?)without explanation because I don't have any...
Chane seems right but I could easily see her as many other types.
Agree with Nice. While I thought Jacuzzi was ISFP at first, after the beginning and the majority of the series he seems more ISFJ. I could see ESFJ also but I'm leaning towards him being introverted since he doesn't feel Fe dominant.
Agree with Eve and Dallas.
I think Czeslaw is ISTJ with similar reasons as Szilard. When he was worrying about people eating him he didn't go by feel at all and went more with 'this happened in the past so I can assume it might happen again'. Of course, almost anybody would react like that if they went through that kind of torture but I can't find examples of him using Ni.
I apologize for taking a while finishing Baccano and writing my typings in such a messy state since I'm in a hurry.