It is especially hard because Mukuro isss pretty pos-neutral with Oz! But what happens from there really is in Oz's court because Mukuro is content to not actually get along with people but still consider them part of his team and whatever.

But Mukuro is a paranoid slightly (...) sociopathic.... person... with issues. So it is never going to be easy.

Mostly it seems like Oz is trying too hard, to me XD Mukuro reads Oz as desperate and weak often. Which doesn't bother him cos Oz is Ruby, but he reacts accordingly. He also has no idea what Oz wants from him which means he tends to give very neutral reactions as well. Cos. Yeah.

... what does oz want from him ...