I think character developement will come, we should just wait a bit, we're only at twenty short chapter after all. That chapter was a bit annoying, but hey, it's not the first, it won't be the last, but we still got some good chapter before, and I think we will still got more. In short, I will just wait and see. (but I agree that Fooly need to stop being such a creep)
That aside, I was a bit surprised to see the thoughts of Leo: someone who realise that in a relationship, communcation is very important. Good!