...Honestly, when he saw that look on Joker's face, he was expecting a way, way more obnoxious answer. Like, obnoxious enough that the reality comes as a relief.

Which is why, in a matter of seconds, Ginko's expression goes from one of tense anticipation (of Some Bullshit), to surprise as that revelation sinks in - and then he lets out an amused, almost disbelieving sigh. "--Seriously? I mean, I guess that... almost makes sense."

Then, after a pause, he grins and adds, "He was definitely smug enough."