[ He doesn't quite understand the issue. He may have others to call upon, but there's no reason why he shouldn't be able to add another. ]

I do not see why that should prevent me from adding another person to that circle.

[ Yi Sang is very serious about this. In fact, he's so serious that he's reaching into his pocket, withdrawing his notebook again. He fishes a pen out of that pocket as well, opening the notebook to a new page. ]

Will you share with me the items that you enjoy? I endeavor to maintain an inventory of all that is of interest to my --

[ He pauses. "Colleagues" doesn't... feel quite right anymore. It doesn't quite strike the proper nuance he seeks. In that case -- ]

My... companions. Of which you may be one of them, if you so desire.

[ ...yes, he supposes that would be the correct term after all. ]