All of the above characters are accepted of course :)

[quote=@Gowi]
The only inquiry (as a player) I have is, wouldn't Harleen be a bit older given the timeline of The Joker and everything with Gotham? Wouldn't she be into her thirties at least?
[/quote]

True but it can be worked around i.e she was only taken on by the Joker later on in his career and although there was a lot going on in that time, maybe she was actually only with him a couple of years.