If Baccano! was a forum...
Isaac and Miria would be the overly enthusiastic members, always warmly welcoming every n00b in the "new members" section. Isaac would open 35 topics a day about everything that passes by his mind, with Miria commenting on each of them, till mod Huey closes them all. They both are phisiologically unable to stay on topic in any discussion.
Huey would be the angry mod banhammering everyone who annoys him.
Elmer would be the nice mod, always trying to make everybody get along and have fun, and not taking anything as srs bizness.
Maiza would be the polite member who was there since the forum was born, he opens interesting discussions and always provides sources for everything he says. He helps the mods but doesn't want to become one. He's always buggered by Firo about how to post links, images, hide spoilers, retrieve his password, etc.
Firo would be the eternal n00b, never understanding how the forum works.
Ladd would be the ultimate troll, spamming the forum an