Oh, you mean Mr. Darkleer! Yes, I know him. I do live with Gamzee, after all. Or, rather, my home is inside of his.

Ah, well, admittedly I would have an easier time if I knew names and could keep all of these characters straight, but you're right. It's very convoluted and confusing. This is actually the very reason I never really spoke with most of my neighbors.