I got a gift from Zarad (my last playthrough's romance option.) Romance was maxed out, I'm not sure if anything else needed to be triggered. (I kissed him when I had the option to, but I don't even remember if that scene was before the ball or after it.) Sorry, don't know if that helps.
I'm playing a runthrough with Lyon right now, approaching week 6 soon. I'll try to pay attention this time and report back.